above throttle valve EGR system
cartridge proportional throttle valve
Electro-hydraulic proportional throttle valve
Minute-flow throttle valve
throttle valve
油门调节阀
节流闪阀
阻尼阀
减压阀
电动蝶阀
高压主汽门
投掷器
节流阀
节璃
主汽阀
统煤
未分选煤
节柳
抛送器
Butterfly valve
蝶形阀
蝴蝶阀
蝶形瓣
蝶阀装置
蝶阀by-pass旁路
节气门
蝴蝶风门
旋转挡板节流阀
蝶型阀
蝴蝶式岩钻
节流阀
碟阀
蝶阀
风门
butterfly valve rock drill
Discus type butterfly valve
hydraulic control check butterfly valve
offset disc eccentric butterfly valve
small white butterfly butterfly
the butterfly valve anti-coking
Tri-eccentric butterfly valve
Triple Eccentric Butterfly Valve
triple-off butterfly valve
wafer style butterfly valve
pressure reducing valve reducing valve