All stainless steel, good looking, heavy duty heating element, safe oil drain cock and over temperature protective device. 特性:全不锈钢,造型美观,高效能发热线,安全放油阀,超温保护装置。
Air tank drain cock drainage relative permeability curve 气箱排放塞〔开关〕排泄相对渗透率曲线
Air tank drain cock discharge prediction of industrial pollution sources 气箱排放塞〔开关〕工业污染源排污预测
The drain screw of fuel oil sludge tank to be changed with valve or cock. 燃油沉淀柜的排放螺杆应改为阀或旋塞。