当开启隔膜阀的时候，在大约一圈中，你会感觉到阻力，到了一圈时，大部分或所有阻力都会消失。
When opening a diaphragm valve , you will feel resistance for approximately one turn , at which point most or all resistance on the handwheel will disappear .
因为他们阀内件材料精心挑选的触觉素质和紧配合完成的贡献与文雅的总体感觉。
Trim materials carefully selected for their tactile qualities and tight fit and finish contribute to an overall sense of refinement.
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