Anh
pre-vacuum pump
rotary pump for backing diffusion pump
Đức
Drehschieberpumpe
Vor-Vakuumpumpe
Pháp
pompe à tiroir rotatif
pre-vacuum pump,rotary pump for backing diffusion pump /INDUSTRY-CHEM,ENG-MECHANICAL/
[DE] Drehschieberpumpe; Vor-Vakuumpumpe
[EN] pre-vacuum pump; rotary pump for backing diffusion pump
[FR] pompe à tiroir rotatif