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1·Always maintain the vacuum pumps!

始终保持水泵内的真空！

2·Single and Double Stage Vane Vacuum Pumps.

单、双级旋片式真空泵。

3·Vacuum technology. Vocabulary. Vacuum pumps.

真空技术。词汇。真空泵。

4·Assembly of the vacuum pumps and other equipment.

组装真空泵及其他设备。

5·Standard configuration for rotary vane vacuum pumps.

标准配置为旋片式真空泵。

6·Vacuum technology; terms and definitions, vacuum pumps.

真空技术。名称和定义。真空泵。

7·Displacement compressors, vacuum pumps, and blowers; Erratum.

容积式压缩机，真空泵和鼓风机。正误表。

8·The vacuum pumps begin sucking the air from the barrel of gun.

真空泵开始抽取电子枪管里的空气。

9·Compressors and vacuum pumps. Safety requirements. Part 2: vacuum pumps.

压缩机和真空泵。安全要求。第2部分：真空泵。

10·The vacuum system utilizes two vacuum pumps and one booster pump to achieve a vacuum.

真空系统采用两台真空泵和一台罗茨泵来实现真空。