1 、 Daim ntawv foaming
(1) Cua kub ceev heev. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Txo cov cua kub kom tsim nyog.
② Txo cov cua kub kom tsim nyog.
③ Tsim kom muaj qhov kev ncua deb ntawm daim ntawv thiab lub rhaub kom lub rhaub kom deb ntawm daim ntawv.
(2) Cov cua sov tsis sib xws. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Kho qhov kev faib tawm ntawm cov cua kub nrog baffle, huab cua faib hood lossis npo kom txhua qhov chaw ntawm daim ntawv rhuab sib npaug.
② Tshawb xyuas seb lub tshuab cua sov thiab cov ntaub thaiv npog puas puas lawm, thiab kho cov khoom puas.
(3) Daim ntawv ntub dej. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Ua kev kho kom qhuav ua ntej. Piv txwv li, 0.5 hli tuab polycarbonate ntawv yuav tsum tau qhuav ntawm 125-130 kub rau 1-2h, thiab 3 hli tuab ntawv yuav tsum tau qhuav rau 6-7h; Daim ntawv nrog thickness ntawm 3 hli yuav tsum tau qhuav ntawm 80-90 kub rau 1-2h, thiab kub sib sau yuav tsum tau nqa tawm tam sim ntawd tom qab ziab.
② Preheat.
③ Hloov hom cua sov rau ob sab cua sov. Tshwj xeeb tshaj yog thaum lub thickness ntawm daim ntawv yog ntau tshaj 2 hli, nws yuav tsum tau rhuab rau ob sab.
④ Tsis txhob qhib cov ntaub ntawv pov thawj noo noo thaum ntxov. Nws yuav tsum tau unpacked thiab tsim tam sim ntawd ua ntej kub sib sau.
(4) Muaj npuas nyob hauv daim ntawv. Cov txheej txheem ntau lawm ntawm daim ntawv yuav tsum tau kho kom tshem tawm npuas.
(5) Hom ntawv tsis raug lossis kev tsim. Cov ntaub ntawv tsim nyog yuav tsum raug xaiv thiab cov qauv yuav tsum raug kho kom haum.
2. Sheet kua muag
(1) Cov pwm tsim tsis zoo, thiab lub vojvoog arc ntawm lub ces kaum me dhau. Lub vojvoog ntawm kev hloov pauv arc yuav tsum tau nce ntxiv.
(2) Daim ntawv cua sov kub yog siab dhau lossis qis dhau. Thaum kub siab dhau lawm, lub sijhawm cua sov yuav tsum raug txo kom tsim nyog, cov cua kub yuav tsum tau txo, cov cua sov yuav tsum tsis sib xws thiab qeeb, thiab cov cua compressed me ntsis txias yuav tsum tau siv; Thaum qhov ntsuas kub qis dhau lawm, lub sijhawm cua sov yuav tsum raug ncua kom tsim nyog, cov cua kub yuav tsum tau nce, daim ntawv yuav tsum tau preheated thiab rhuab sib npaug.
3. Sheet charring
(1) Cov cua kub kub yog siab dhau. Lub sijhawm cua sov yuav tsum raug txo kom tsim nyog, qhov kub ntawm lub rhaub yuav tsum raug txo, qhov kev ncua deb ntawm lub rhaub thiab cov ntawv yuav tsum tau nce, los yog ib lub vaj tse yuav tsum tau siv rau kev sib cais kom cov ntawv kub maj mam.
(2) Cov txheej txheem cua sov tsis raug. Thaum tsim cov ntawv tuab, yog tias ib sab cua sov tau txais, qhov kub sib txawv ntawm ob sab yog loj. Thaum lub nraub qaum ncav cuag qhov kub thiab txias, lub hauv ntej tau overheated thiab charred. Yog li ntawd, rau cov nplooj ntawv nrog lub thickness ntau dua 2 hli, txoj kev cua sov ntawm ob sab yuav tsum tau saws.
4 、 Daim ntawv tawg
(1) Daim ntawv kub heev. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Txo lub sijhawm cua sov kom zoo.
② Txo cov cua kub kom tsim nyog.
(2) Lub melt flow rate ntawm raw khoom yog siab dhau. Tsawg melt flow rate yuav tsum tau siv kom deb li deb tau thaum lub sijhawm tsim khoom
Los yog tsim nyog txhim kho daim duab piv ntawm daim ntawv.
(3) Qhov chaw thermoforming loj dhau. Cov ntxaij vab tshaus thiab lwm yam ntaub thaiv npog yuav tsum tau siv los ua kom sov sib npaug, thiab daim ntawv tuaj yeem ua kom sov
Zone sib txawv cua sov kom tsis txhob overheating thiab vau nyob rau hauv nruab nrab cheeb tsam.
(4) Cov cua kub tsis sib xws lossis cov khoom siv tsis sib xws ua rau muaj qhov sib txawv ntawm qhov sib txawv ntawm txhua daim ntawv. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Cov pa xa hluav taws xob tau teeb tsa ntawm txhua qhov chaw ntawm lub tshuab cua sov kom cov cua kub sib npaug.
② Tus nqi thiab qhov zoo ntawm cov khoom siv rov ua dua tshiab hauv daim ntawv yuav tsum tswj hwm.
③ Kev sib xyaw ntawm cov khoom sib txawv yuav tsum zam
Daim ntawv cua kub kub yog siab dhau lawm. Cov cua kub cua sov thiab lub sijhawm cua sov yuav tsum raug txo kom zoo, thiab lub tshuab cua sov tuaj yeem khaws cia kom deb ntawm daim ntawv,
Tshav kub maj mam. Yog tias daim ntawv yog overheated hauv zos, qhov overheated tuaj yeem npog nrog cov ntaub thaiv npog.
5, Nto dej ripple
(1) Qhov kub ntawm lub twj tso kua mis yog qis heev. Nws yuav tsum tau kho kom zoo. Nws tuaj yeem muab qhwv nrog ntoo siab pab plunger lossis paj rwb ntaub plaub thiab daim pam
Plunger kom sov.
(2) Pwm kub tsawg dhau. Lub curing kub ntawm daim ntawv yuav tsum tau nce kom tsim nyog, tab sis yuav tsum tsis txhob tshaj qhov curing kub ntawm daim ntawv.
(3) Tsis sib xws tuag txias. Cov kav dej txias lossis lub dab dej yuav tsum muab ntxiv, thiab xyuas seb cov kav dej puas raug thaiv.
(4) Daim ntawv cua sov kub yog siab dhau. Nws yuav tsum raug txo kom raug, thiab daim ntawv saum npoo tuaj yeem txias me ntsis los ntawm huab cua ua ntej tsim.
(5) Kev xaiv tsis raug ntawm kev tsim cov txheej txheem. Lwm cov txheej txheem tsim yuav tsum tau siv.
6, Nto stains thiab stains
(1) Qhov saum npoo ntawm cov pwm kab noj hniav yog siab dhau lawm, thiab cov huab cua yog daig ntawm cov pwm du, ua rau cov pob zeb ntawm cov khoom nto. Coping hom
Qhov saum npoo ntawm cov kab noj hniav yog xuab zeb blasted, thiab ntxiv lub tshuab nqus tsev rho tawm qhov tuaj yeem ntxiv.
(2) Kev khiav tawm tsis zoo. Cua rho tawm qhov yuav tsum tau ntxiv. Yog hais tias pob txuv tsuas tshwm sim nyob rau hauv ib feem, xyuas seb lub qhov nqus yog thaiv
Los yog ntxiv cov cua rho tawm qhov hauv cheeb tsam no.
(3) Thaum siv cov ntawv uas muaj cov yas yas, cov yas yas ntim rau ntawm qhov chaw tuag los ua cov pob. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Siv cov pwm uas tswj tau qhov kub thiab txias thiab kho cov pwm kub kom tsim nyog.
② Thaum tshav kub ntawm daim ntawv, pwm yuav tsum nyob deb ntawm daim ntawv li sai tau.
③ Txo lub sijhawm cua sov kom zoo.
④ Ntxuav cov pwm hauv lub sijhawm.
(4) Pwm kub siab dhau lossis qis dhau. Nws yuav tsum tau kho kom haum. Yog tias pwm kub siab dhau lawm, ntxiv dag zog rau qhov txias thiab txo cov pwm kub; Yog tias pwm kub qis dhau lawm, pwm kub yuav tsum tau nce thiab pwm yuav tsum tau insulated.
(5) Kev xaiv tsis raug ntawm cov khoom siv tuag. Thaum ua cov ntawv pob tshab, tsis txhob siv phenolic resin los ua pwm, tab sis txhuas pwm.
(6) Qhov chaw tuag yog ntxhib heev. Cov kab noj hniav saum npoo yuav tsum tau polished los txhim kho qhov chaw tiav.
(7) Yog tias qhov chaw ntawm daim ntawv lossis pwm kab noj hniav tsis huv, cov av ntawm daim ntawv lossis pwm kab noj hniav yuav tsum raug tshem tawm tag nrho.
(8) Muaj qhov khawb ntawm qhov chaw ntawm daim ntawv. Qhov saum npoo ntawm daim ntawv yuav tsum polished thiab daim ntawv yuav tsum muab khaws cia nrog ntawv.
(9) Cov plua plav cov ntsiab lus hauv huab cua ntawm qhov chaw tsim khoom yog siab dhau. Qhov chaw tsim khoom yuav tsum tau purified.
(10) Pwm demoulding txoj kab nqes me dhau. Nws yuav tsum tau nce kom tsim nyog
7, Deg yellowing lossis discoloration
(1) Daim ntawv cua sov kub tsawg dhau. Lub sijhawm cua sov yuav tsum raug ncua kom zoo thiab cov cua sov yuav tsum tau nce ntxiv.
(2) Daim ntawv cua sov kub yog siab dhau. Lub sijhawm cua sov thiab qhov kub thiab txias yuav tsum raug txo kom tsim nyog. Yog tias daim ntawv yog overheated hauv zos, nws yuav tsum tau kuaj xyuas
Tshawb xyuas seb lub tshuab cua sov puas muaj kev tswj hwm.
(3) Pwm kub tsawg dhau. Preheating thiab thermal rwb thaiv tsev yuav tsum tau nqa tawm kom ua kom zoo pwm kub.
(4) Qhov kub ntawm lub twj tso kua mis yog qis dhau. Nws yuav tsum tau rhuab kom zoo.
(5) Daim ntawv yog stretched heev. Daim ntawv tuab yuav tsum tau siv los yog daim ntawv uas muaj ductility zoo dua thiab siab dua tensile zog yuav tsum tau hloov, uas tuaj yeem dhau los ntawm
Hloov cov tuag kom kov yeej qhov kev ua tsis tiav no.
(6) Daim ntawv txias ua ntej ua ntej nws tag nrho tsim. Tib neeg pwm ceev thiab khiav ceev ntawm daim ntawv yuav tsum tau nce kom tsim nyog, thiab cov pwm yuav tsum tsim nyog
Thaum tshav kub kub preservation, lub plunger yuav tsum tau rhuab kom zoo.
(7) Kev tsim qauv tuag tsis raug. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Tsim nyog tsim qhov demoulding nqes hav. Feem ntau, nws tsis yog tsim nyog los tsim qhov demoulding txoj kab nqes thaum lub sij hawm poj niam pwm tsim, tab sis tsim ib co slopes yog conducive rau lub uniform phab ntsa thickness ntawm cov khoom. Thaum tus txiv neej pwm yog tsim, rau styrene thiab nruj PVC nplooj ntawv, qhov zoo tshaj plaws demoulding nqes hav yog hais txog 1:20; Rau cov ntawv polyacrylate thiab polyolefin, txoj kab nqes demoulding yog qhov zoo dua li 1:20.
② Tsim nyog nce lub vojvoog fillet. Thaum cov npoo thiab cov ces kaum ntawm cov khoom yuav tsum nruj, lub dav hlau inclined tuaj yeem hloov lub voj voog ncig, thiab tom qab ntawd lub dav hlau inclined tuaj yeem txuas nrog lub voj voog me me.
③ Txo qhov tob tob kom tsim nyog. Feem ntau, qhov tob tensile ntawm cov khoom yuav tsum tau txiav txim siab ua ke nrog nws qhov dav. Thaum lub tshuab nqus tsev yog siv ncaj qha rau molding, lub tensile qhov tob yuav tsum tsawg dua los yog sib npaug rau ib nrab ntawm qhov dav. Thaum xav tau kev kos duab sib sib zog nqus, lub siab pab plunger lossis pneumatic zawv zawg txoj kev yuav tsum tau txais yuav. Txawm hais tias nrog cov txheej txheem tsim no, lub tensile qhov tob yuav tsum raug txwv kom tsawg dua lossis sib npaug ntawm qhov dav.
(8) Cov khoom siv rov ua dua ntau dhau yog siv. Nws npaum li cas thiab zoo yuav tsum tau tswj.
(9) Cov mis raw khoom tsis ua raws li qhov xav tau ntawm thermoforming. Cov qauv tsim yuav tsum tau kho kom zoo thaum ua cov ntawv
8. Daim ntawv arching thiab wrinkling
(1) Daim ntawv kub heev. Lub sij hawm cua sov yuav tsum tau luv kom zoo thiab cov cua sov yuav tsum tau txo.
(2) Lub zog yaj ntawm daim ntawv yog tsawg dhau. Resin nrog tsawg melt flow rate yuav tsum tau siv kom deb li deb tau; Txhim kho qhov zoo ntawm daim ntawv thaum lub sij hawm tsim khoom
Tensile ratio; Thaum lub sij hawm kub sib sau, qis dua qhov kub yuav tsum tau saws kom deb li deb tau.
(3) Kev tswj tsis raug ntawm kev kos duab piv thaum tsim khoom. Nws yuav tsum tau kho kom haum.
(4) Cov kev taw qhia extrusion ntawm daim ntawv yog sib npaug rau qhov sib nrug ntawm qhov tuag. Daim ntawv yuav tsum tig 90 degrees. Txwv tsis pub, thaum daim ntawv yog ncab raws li extrusion kev taw qhia, nws yuav ua rau molecular orientation, uas tsis tuaj yeem raug tshem tawm tag nrho txawm los ntawm molding cua sov, uas ua rau daim ntawv wrinkles thiab deformation.
(5) Lub zos txoj hauj lwm txuas ntxiv ntawm daim ntawv thawb los ntawm lub plunger ua ntej yog ntau dhau los yog cov qauv tsim tsis tsim nyog. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Nws yog tsim los ntawm poj niam pwm.
② Ntxiv cov kev pab cuam xws li plunger kom flatten lub wrinkles.
③ Ua kom lub demoulding taper thiab fillet radius ntawm cov khoom kom ntau li ntau tau.
④ Tsim nyog ua kom lub zog ceev ntawm lub siab pab plunger lossis tuag.
⑤ Tsim nyog tsim ntawm ncej thiab siab pab plunger
9, Warpage deformation
(1) Cov cua txias tsis sib xws. Cov yeeb nkab dej txias ntawm pwm yuav tsum tau ntxiv, thiab xyuas seb cov yeeb nkab dej txias puas raug thaiv.
(2) Tsis sib xws phab ntsa thickness faib. Cov cuab yeej ua ntej ncab thiab lub siab pab yuav tsum tau txhim kho thiab siv lub plunger siab. Daim ntawv siv rau kev tsim yuav tsum yog tuab thiab nyias
Cov cua kub sib xws. Yog tias ua tau, cov qauv tsim ntawm cov khoom yuav tsum raug kho kom tsim nyog, thiab stiffeners yuav tsum tau teem rau ntawm lub dav hlau loj.
(3) Pwm kub tsawg dhau. Cov pwm kub yuav tsum tsim nyog nce kom tsawg dua qhov kub ntawm daim ntawv, tab sis cov pwm kub yuav tsum tsis txhob siab dhau, txwv tsis pub.
Shrinkage loj heev.
(4) Demoulding ntxov dhau. Lub sijhawm txias yuav tsum tau nce kom tsim nyog. Cua txias tuaj yeem siv los ua kom cov khoom txias txias, thiab cov khoom yuav tsum tau txias rau
Tsuas yog thaum lub curing kub ntawm daim ntawv hauv qab no, nws tuaj yeem demoulded.
(5) Cov ntawv ntsuas kub tsawg dhau. Lub sijhawm cua sov yuav tsum raug ncua kom tsim nyog, qhov kub thiab txias yuav tsum tau nce ntxiv thiab kev khiav tawm yuav tsum nrawm dua.
(6) Pwm tsim tsis zoo. Tus qauv tsim yuav raug hloov kho. Piv txwv li, thaum lub tshuab nqus tsev tsim, tus naj npawb ntawm lub tshuab nqus tsev yuav tsum tau nce kom tsim nyog, thiab cov pwm qhov yuav tsum tau nce ntxiv.
Txiav qhov zawj ntawm kab.
10, Daim ntawv ua ntej ncab tsis sib xws
(1) Lub thickness ntawm daim ntawv yog tsis sib xws. Cov txheej txheem ntau lawm yuav tsum tau hloov kho kom tswj cov thickness uniformity ntawm daim ntawv. Thaum kub sib sau, nws yuav tsum tau nqa tawm maj mam
Cua sov.
(2) Cov ntawv yog rhuab tsis sib xws. Tshawb xyuas lub rhaub thiab thaiv qhov screen kom puas.
(3) Qhov chaw tsim khoom muaj huab cua loj. Lub chaw ua haujlwm yuav tsum tau tiv thaiv.
(4) Cov cua compressed yog tsis sib npaug. Cov cua distributor yuav tsum tau teem rau ntawm cov cua inlet ntawm lub pre stretching lub thawv kom cov cua tshuab tsis sib xws.
11 、 Phab ntsa ntawm lub ces kaum yog nyias heev
(1) Kev xaiv tsis raug ntawm kev tsim cov txheej txheem. Cov txheej txheem cua expansion plug siab pab yuav siv tau.
(2) Daim ntawv nyias nyias. Cov ntawv tuab dua yuav tsum tau siv.
(3) Cov ntawv tsis sib xws. Lub tshuab cua sov yuav tsum raug kuaj xyuas thiab qhov kub ntawm qhov ua rau lub kaum ntawm cov khoom yuav tsum qis dua. Ua ntej nias, kos qee cov kab hla ntawm daim ntawv los saib xyuas cov khoom ntws thaum lub sijhawm tsim, txhawm rau kho qhov kub thiab txias.
(4) Qhov kub tsis sib xws. Nws yuav tsum tau kho kom zoo kom zoo ib yam.
(5) Kev xaiv tsis raug ntawm cov khoom siv raw rau kev tsim khoom. Cov khoom siv raw yuav tsum tau hloov
12 、 Tsis sib xws thickness ntawm ntug
(1) Kev tswj pwm tsis zoo. Nws yuav tsum tau kho kom haum.
(2) Kev tswj tsis raug ntawm daim ntawv cua sov kub. Nws yuav tsum tau kho kom haum. Feem ntau, cov thickness tsis sib xws yog ib qho yooj yim tshwm sim ntawm qhov kub thiab txias.
(3) Kev tswj ceev molding tsis raug. Nws yuav tsum tau kho kom haum. Hauv kev tsim tiag tiag, qhov uas tau pib ncab thiab thinned yog txias sai
Txawm li cas los xij, qhov elongation txo qis, yog li txo qhov sib txawv thickness. Yog li ntawd, phab ntsa thickness sib txawv tuaj yeem hloov kho rau qee yam los ntawm kev kho qhov sib sau ceev.
13 、 Cov phab ntsa tsis sib xws
(1) Daim ntawv melts thiab collapses tiag. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Cov resin uas tsis tshua muaj dej ntws yog siv rau kev ua yeeb yaj kiab, thiab qhov sib piv yog qhov tsim nyog ntxiv.
② Nqus plua plav nrawm nrawm los yog huab cua nthuav dav lub tshuab nqus tsev rub rov qab yog siv.
③ Cov ntaub thaiv npog yog siv los tswj qhov kub thiab txias hauv nruab nrab ntawm daim ntawv.
(2) Cov ntawv tuab tsis sib xws. Cov txheej txheem ntau lawm yuav tsum tau hloov kho kom tswj cov thickness uniformity ntawm daim ntawv.
(3) Cov ntawv yog rhuab tsis sib xws. Cov txheej txheem cua sov yuav tsum tau txhim kho kom cov cua sov sib npaug. Yog tias tsim nyog, siv cov khoom siv cua thiab lwm yam khoom siv; Xyuas seb txhua qhov cua sov ua haujlwm li cas.
(4) Muaj huab cua loj nyob ib puag ncig cov khoom siv. Lub chaw ua haujlwm yuav tsum tau muaj kev tiv thaiv los thaiv cov roj ntws.
(5) Pwm kub tsawg dhau. Cov pwm yuav tsum tau muab rhaub kom sib npaug rau qhov ntsuas kub kom haum thiab cov pwm txias yuav tsum tau kuaj xyuas qhov thaiv.
(6) Xaub daim ntawv kom deb ntawm tus ncej clamping. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Kho lub siab ntawm txhua feem ntawm lub thav duab clamping kom lub clamping quab yuam sib xws.
② Tshawb xyuas seb lub thickness ntawm daim ntawv tsis zoo li qub, thiab daim ntawv nrog cov tuab tuab yuav tsum tau siv.
③ Ua ntej clamping, ua kom sov lub thav duab clamping kom haum rau qhov kub thiab txias, thiab qhov kub nyob ib ncig ntawm lub thav duab clamping yuav tsum zoo ib yam.
14 、 Lub kaum sab xis
(1) Kev nyuaj siab concentration ntawm kaum. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Tsim nyog nce lub vojvoog arc ntawm lub ces kaum.
② Tsim kom muaj qhov kub thiab txias ntawm daim ntawv.
③ Txhim kho pwm kom zoo.
④ Kev ua kom txias qeeb tuaj yeem pib tsuas yog tom qab cov khoom tiav lawm.
⑤ Cov zaj duab xis resin nrog kev ntxhov siab tawg tsis kam yog siv.
⑥ Ntxiv cov stiffeners ntawm cov ces kaum ntawm cov khoom.
(2) Pwm tsim tsis zoo. Cov tuag yuav tsum tau hloov kho raws li lub hauv paus ntsiab lus ntawm kev txo cov kev ntxhov siab concentration.
15, Adhesion plunger
(1) Qhov kub ntawm cov hlau siab pab plunger siab dhau lawm. Nws yuav tsum raug txo kom tsim nyog.
(2) Qhov saum npoo ntawm ntoo plunger tsis yog coated nrog tso tawm tus neeg sawv cev. Ib lub tsho ntawm cov roj los yog ib lub tsho ntawm Teflon txheej yuav tsum tau siv.
(3) Lub plunger nto tsis yog qhwv nrog ntaub plaub lossis paj rwb. Lub plunger yuav tsum tau qhwv nrog paj rwb ntaub los yog daim pam
16 、 Kev tuag
(1) Cov khoom kub yog siab dhau thaum demoulding. Cov pwm kub yuav tsum tau txo me ntsis los yog lub sij hawm txias yuav tsum tau ncua.
(2) Tsis txaus pwm demoulding nqes hav. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Ua kom cov pwm tso tawm txoj kab nqes.
② Siv tus poj niam pwm los tsim.
③ Demould kom sai li sai tau. Yog tias cov khoom tsis txias hauv qab qhov ntsuas kub thaum lub sijhawm demoulding, cov pwm txias tuaj yeem siv rau cov kauj ruam ntxiv tom qab demoulding.
Txias.
(3) Muaj grooves ntawm qhov tuag, ua rau tuag sticking. Cov hauv qab no tuaj yeem siv los tshem tawm:
① Demoulding ncej yog siv los pab demoulding.
② Ua kom huab cua siab ntawm pneumatic demoulding.
③ Sim demould kom sai li sai tau.
(4) Cov khoom ua raws li cov pwm ntoo. Qhov saum npoo ntawm cov ntoo tuaj yeem raug coated nrog ib txheej ntawm cov neeg sawv cev tso tawm lossis txau nrog txheej txheej ntawm polytetrafluoroethylene
Xim.
(5) Qhov saum npoo ntawm pwm kab noj hniav yog ntxhib heev. Nws yuav tsum polished
Post lub sij hawm: Oct-28-2021