【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...
【单选题】某彩色地板砖规格为200×200×5mm,灰缝为1mm,结合层为20厚1:2水泥砂浆,试计算100m2地面中地板砖和砂浆的消耗量。(面砖和砂浆损耗率均为1.5%)
【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. -- _________.
【单选题】某彩色地板砖规格为300×300×5mm,灰缝为1mm, 200m2地面中地板砖的消耗量为(),已知:面砖损耗率均为1.5%。
【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?