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 .

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。

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Recommended Opening Procedure: The diaphragm valve handwheel rotates about 1 1 /4 turns from fully open to closed.

推荐的开启程序：从彻底打开到关闭，隔膜阀手轮旋转大约11/4圈。

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The invention discloses an electroacoustic transducer which comprises a stationary electric vibrating diaphragm, an opening plate and a plurality of spacing structures.

本发明公开一种电声换能器，电声换能器包括一驻电振膜、一开孔板以及多个间隔结构。

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