The utility model relates to a vacuum gaining device, in particular to the improvement of a slidingvalve 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。
2
Therefore, during the vacuum plugging, the intermediate slidingvalve (14) can be held near the opening end (30) of the syringe cylinder (12).
因此,在真空打栓时,可利用注射筒(12)的开口端(30)的附近保持中间滑动阀(14)。
3
Even when an intermediate slidingvalve (14) is disposed at the position of the groove (32), the interior of the syringe cylinder (12) can be depressurized.