ZJ type Roots vacuum pump can't discharge gases directly into the air,it should be equipped with a cowesponding prepump at operation.
ZJ型罗茨真空泵不能直排大气，运行时需配备相应前级泵。
| 单词 | Roots vacuum pump |
| 释义 |
Roots vacuum pump
英语例句库
ZJ type Roots vacuum pump can't discharge gases directly into the air,it should be equipped with a cowesponding prepump at operation. ZJ型罗茨真空泵不能直排大气，运行时需配备相应前级泵。 |
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