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Cov khoom lag luam uas pabcuam kev noj qab haus huv ntawm cov pejxeem.Raws li WHO, cov khoom lag luam no yuav tsum muaj "txhua lub sijhawm, nyob rau hauv cov nyiaj txaus, hauv cov ntawv tsim nyog, nrog rau cov ntaub ntawv zoo thiab cov ntaub ntawv txaus, thiab ntawm tus nqi uas tus neeg thiab cov zej zog muaj peev xwm them taus".

npuas cov pos hniav tshuab

Pob puab thiab square puab npuas pos hniav ua tshuab

Tus cwj pwm General:

Peb lub tshuab ua npuas ncauj tuaj yeem tsim cov khoom sib txawv ntawm cov pos hniav, xws li cov duab square, oval puab, pob puab, corrugated puab thiab lwm yam.Thiab npuas cov pos hniav ua tshuab tuaj yeem tsim cov pos hniav hauv nruab nrab thiab ob xim cov pos hniav.Peb paub yuav ua li cas tsim cov pos hniav ua npuas ncauj, yuav ua li cas ua kom laus chav rau cov pos hniav npuas.

Cov kab pos hniav no siv plaub hau ntsia hlau extruding txheej txheem, ua rau cov pos hniav npuas lub koom haum thiab muaj saj zoo.Thiab peb txais cov txheej txheem kab rov tav rov qab txias, tsis txhob cuam tshuam.

Thiab peb qhov ntsuas kub tsis tu ncua, xyuas kom cov khoom tshiab, thiab qab zib strip zoo ib yam.Peb kuj tau txais tri-angle prism zawj cov menyuam, ua kom lub siab tso rau ntawm cov khoom ruaj khov, thiab cov khoom siv extruding ntau npaum li cas, thiab muaj qhov zoo nkauj.

kev nug nthuav dav