Yuav ua li cas tswj cov pvc bar khiav lev?

1. Xaiv thaum huab cua zoo, coj nws tawm hauv lub hnub kom tsis muaj menyuam, thiab muab nws tso rau hauv tsev ntev. Yog tias nws ntsib cov huab cua noo, nws yog qhov yooj yim rau pwm.

2. Qhuav nws tam sim ntawd tom qab ntxuav kom nws qhuav. Yog tias koj tau txais mimeographs, xim tsev, lossis kua zaub, ntxuav lawv tam sim ntawd kom huv kom tsis txhob muaj cov ntxhiab tsw ntxhiab tsw.

3. Kev ntxuav ntawm lub bar mat yog tib yam li kev tu txhua hnub. Nws yog ib qho yooj yim yaug nrog dej kub hauv qab 40 ℃. Qee qhov kev siv xab npum tsis siv tuaj yeem siv tau. Tsis txhob siv cov kua qaub thiab alkaline tshuaj ntxuav kom huv, vim tias nws yuav ua kom nrawm nrawm ntawm cov laus pob bar.

4. Thaum tu, nco ntsoov tias txhua qhov seem ntawm tus neeg tu kom huv tau muab ntxuav, thiab ziab hauv lub sijhawm tom qab ntxuav kom huv.