【简答题】Diaphragm valves use a flexible and to regulate flow. The handwheel operates just like the handwheel on valve. The is attached to a device called the . The compressor pushes on a flexible diaphragm. T...
【简答题】The party( )very well, thanks.
【判断题】Generally pressure drop across the body of the nonweir diaphragm valves is larger than that of weir diaphragm valves.
【简答题】Diaphragm valves do not use .
【单选题】-- Well, thanks very much. -- _________.
【判断题】A diaphragm valve does not use packing.
【判断题】Diaphragm valves are mechanical valves that prevent reverse flow in piping
【单选题】Well, thanks very much for_________ my talk. Are there any questions?