Lub 630 hli multi - Lub Tsib Hlis Mand pom ib txwm yog peb cov khoom qub. Nws 'kev txiav ntau ntawm 120-630mm thiab khov kho kev ua tau zoo ua rau nws xaiv cov neeg yuav khoom zoo rau peb cov neeg siv khoom.
Ib hom tshiab 630 hli multi - Lub Tsib Xaj Nrov tau npaj rau Hebei xeev nyob rau hauv North Suav teb. Tus neeg siv khoom yuav siv nws los txiav PE PIPES los ntawm 150-630mm ua rau cov yeeb nkab fittings.