Rau txhua yam khoom siv tshuab hluav taws xob, cov teeb meem hnav yog teeb meem uas yuav ntsib. Tus yuam sij yog yuav ua li cas kom zoo txo cov khoom ntawm cov khoom siv. Thaum twg ntau lub tuam txhab siv cov cuab yeej siv, lawv yuav pom tias txhua lub tuam txhab yuav hnav tawm tom qab siv sijhawm, xws li cov khoom siv linear, thiab lwm yam teeb meem no tseem yuav tshwm sim. Yog li ntawd, yog li lub tuam txhab cov neeg ua haujlwm paub yuav ua li cas txo txoj kev coj ntawm kev tawm ntawm kab. Tom ntej no, Kuv yuav qhia luv luv yuav ua li cas txo txoj kev coj ntawm kev tawm ntawm kab.
1. Yog tias kev coj tus kheej sab hauv yog nyob rau hauv lub xeev hnav, tom qab hnav, cov lus qhia yuav tsum raug tshem tawm sab hauv, lossis scraped nrog xab npum kom ntxuav cov kab ntawv tawm. Yog tias tag nrho cov lus qhia hnav, nws tuaj yeem ntxuav nrog cov kerosene. Yog tias cov lus qhia tsis sib xws, qhov tsis sib xws tom qab ntxuav yuav ua raws li kev sib tsoo thiab ua rau nws du.
2. Siv cov tshuaj tiv thaiv colloid rau saum npoo ntawm cov kab ke kev sib tw ntawm cov kev sib tw ntawm kev sib tw los ntawm kev sib cuag nrog 24 teev kom kho tau colloid.