medium vacuum meaning in English

中度真空
中真空

Vacuum technology ; acceptance specifications for roots vacuum pumps for the range of medium vacuum
真空技术.中等级真空范围用罗茨真空泵的验收规范
Vacuum technology ; acceptance specifications for rotary plunger vacuum pumps , sliding vane rotary vacuum pumps and rotary piston vacuum pumps for the ranges of rough and medium vacuum
真空技术.近似真空和中等真空范围用旋转柱塞真空泵