Leej twg paub tias cov khoom siv hauv tsev tsis pheej yig, cov khoom siv raw ntawm bituminous shingles yog dav dav, yog li nws belongs rau tus nqi nruab nrab hauv kev ua lag luam, thiab tus nqi ntawm bituminous shingles tsis siab, uas haum rau kev nqis peev ntawm cov neeg tsim khoom thiab cov neeg siv khoom. nws yog dav siv nyob rau hauv peb lub khw.

Second, a wide variety of products

Cov khoom siv rau lub sijhawm ntev yuav ua rau tib neeg pom kev qaug zog, thiab ntau yam khoom siv asphalt shingle, cov khoom xim yog nplua nuj dua, thiab muaj cov yeeb yuj lub koob npe nrov, yog li cov neeg siv khoom muaj kev xaiv ntau dua rau asphalt shingle.

Peb, cov khoom zoo

Lub tuam txhab txais cov iav fiber ntau, kub kub sintered xuab zeb, qib high-qib txoj kev asphalt thiab lwm yam ntaub ntawv raw, ua tiav, tuaj yeem hu ua pheej yig thiab zoo, thiab muaj dej tsis zoo, tiv thaiv tshav kub, suab rwb thaiv tsev thiab lwm yam ntxwv, nyiam los ntawm cov neeg siv khoom, nws cov kev pab cuam lub neej. tuaj yeem ncav cuag ntau tshaj 30 xyoo, belongs rau lub teeb lub tsev cov ntaub ntawv, zoo heev txo lub ru tsev hnyav.