国产成人免费成人免费视频在线观看,国产精品宅男免费,久久亚洲?欧美,人妻就是爽30p,亚洲成a人无码av网站,亚洲V国产V中文在线

Baigang valve group production sales DYFC-II Three-way street valve is called the 3-way valve, is material conveying system in the control material fast commutator ideal equipment, widely used in building material, metallurgy, mining, light industry, food industry such as solid particles and powder material conveying.

It is a series of products developed by our factory according to the special requirements of solid particles and powder materials. The valve mainly consists of valve body, valve shaft, valve plate, crank mechanism, electric push rod (electro-hydraulic push rod, pneumatic push rod or Manual mechanism) and other components. With small size, light weight, good wear resistance, long service life, resistance is small, the use of electric putter, electro-hydraulic push rod, pneumatic push rod drive, you can quickly switch the material flow.