DIN 28426-1-1983 真空技术.近似真空和中等真空范围用旋转柱塞真空泵、叶片式旋转真空泵和旋转式活塞真空泵验收规范
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
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 vacuumTechnique du vide; conditions de réception pour pompes à vide à piston o