Txoj kev kuaj pom dej: muab lub hnab tsis yog ib puag ncig rau hauv dej thiab nias nws mus rau hauv qab dej. Lub hnab ntim khoom tsis muaj dej tsis muaj paug muaj kuab paug muaj qhov sib tsoo tshwj xeeb me me thiab tuaj yeem tshwm sim saum npoo. Lub hnab lom tsis yog ib puag ncig muaj hnyav thiab tog.
Cov txheej txheem tshuaj tua hluav taws: non-toxic polyethylene non-ib puag ncig lub hnab yog nplaim taws, nplaim yog xim xiav, lub siab kawg yog daj, nws ntws tawm zoo li lub tswm ciab tsim kua muag thaum hlawv, muaj cov pa roj paraffin, muaj pa taws tsawg dua; lom PVC lub hnab tsis yog ib puag ncig yog tsis kub, Nws yog extinguished thaum nws tawm ntawm qhov hluav taws kub, nplaim taws yog daj, hauv qab yog ntsuab, muag tuaj yeem kos tau, thiab muaj cov ntxhiab tsw ntawm hydrochloric acid.
Txoj kev kuaj pom tus mob: Siv lub hnab tsis yog ib puag ncig nrog ib sab tes thiab co nrog lub zog. Tus neeg uas ua rau lub suab nkig yog non-toxic; lub suab muaj kuab lom thiab tus po.
Txoj kev ntsuas qhov tseeb: cov khoom siv tsis muaj tshuaj lom lub hnab tsis yog ib puag ncig yog milky dawb, lub plhaw, lossis xim tsis muaj pob tshab thiab pob tshab, yoog raws, tes-pleev, qhov saum npoo yog zoo li siv quav ciab; tshuaj lom cov hnab ntim khoom tsis muaj ib puag ncig yog turbid lossis daj, thiab txhais tes xuas lo nplaum.
