Cov khoom tsim kev puas tsuaj uas tsim los ntawm kev sib tsoo ntawm cov roj av: cov pa taws, pos huab, Petroleum Resin carbon oxides, cov khoom tawg tsis tiav, Petroleum Resin thiab flammable hydrocarbons. Cov hluav taws tua hluav taws yuav tsum siv cov cuab yeej tua hluav taws uas tsim nyog: siv cov dej pos huab, ua npuas dej, Roj av Resin qhuav hmoov lossis carbon dioxide tua hluav taws. Nws yog txwv tsis pub siv cov dej ncaj qha tam sim no los tua hluav taws. Cov lus qhia tua hluav taws rau cov roj av: xyuas kom lub sijhawm txias txias kom tsis txhob rov ignition. Tshem tawm thiab tshem tawm thaj tsam hluav taws. Tiv thaiv kom tsis txhob muaj kuab paug los ntawm qhov chaw tswj hluav taws los ntawm kev nkag mus rau cov dej ntws, Petroleum Resin sewers lossis cov dej haus. Cov neeg tua hluav taws yuav tsum siv cov cuab yeej tiv thaiv txheej txheem Petroleum Resin thiab siv cov cuab yeej ua pa ntawm tus kheej hauv qhov chaw kaw. Siv cov tshuaj tsuag dej kom txias qhov hluav taws kub thiab tiv thaiv cov neeg ua haujlwm.
Petroleum resin yog ntim rau hauv ib lub hnab woven lined nrog hnab yas. Peb lub tuam txhab tuaj yeem muab lwm txoj hauv kev ntim khoom thiab cov lus qhia tshwj xeeb raws li cov neeg siv khoom xav tau. Cov khoom no tuaj yeem thauj tau los ntawm tsheb, tsheb ciav hlau, nkoj, Roj av Resin thiab lwm yam. Thaum lub sij hawm thauj mus los, Roj av Resin yuav tsum tau tiv thaiv los ntawm tshav ntuj, nag, noo noo, thiab hooks. Tsis txhob sib tov thiab thauj nrog alkalis thiab oxidants. Petroleum resin yog cov tshuaj tsis muaj teeb meem. Cov khoom yuav tsum tau muab cia rau hauv ib lub qhov cua, Roj av Resin txias thiab qhuav qhov chaw nrog lub sij hawm cia ntawm 1 xyoo.
