... relay valve top cover 继动阀顶盖 valve housing cover 阀室盖 valve casing cover 阀箱盖 ...
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阀室盖不见了。
而压力侧以相同的力削弱了密封，这样使阀盖腔室和阀杆填料几乎总是承受最大管道压力。
The same force tends to reduce the seal on the pressure side with the result that bonnet cavity and the valve stem packing are nearly always subjected to maximum pipeline pressure.
弹簧制动气室，制动阀，藕合器，七芯电缆，螺旋气管，轮毂盖。
Spring brake chamber, brake valve, gland hand, 7 electric coil, spring coil, trailer parts for the USA.
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