Damper valve;DN 3600 thiab 1800

Siv lub zog muaj zog, ua tiav cov cuab yeej tsim khoom kom tau raws li koj qhov yuav tsum tau ua, cov kws tshaj lij engineers thiab kev muag khoom txawv teb chaws yuav muab kev pabcuam kom txaus siab rau koj, THT VALVE!