... spool valve 短管阀; 柱形阀 spool valve pump 滑阀配流泵 spool-type control valve 绕线轴式控制阀 ...
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The utility model relates to a vacuum gaining device, in particular to the improvement of a sliding valve in the sliding spool vacuum pump.
本实用新型涉及真空获得设备，特别是滑阀式真空泵中滑阀的改进。
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