Always maintain the vacuum pumps!

始终保持水泵内的真空！

youdao

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。

youdao

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。

youdao