gas ballast pump [真空] 气镇泵

rotary gas ballast pump 回转载气泵

gas ballast pump coupling 气镇泵联轴器

air ballasting pump gas-ballast pump 气镇泵

gas ballast vacuum pump [真空] 气镇真空泵

gas ballast rotary pump 气镇旋转泵 ; 载气旋转泵

gas ballast roughing-holding pump 气镇粗抽泵

gas-ballast ĵ pump 载气泵

gas ballast agendary pump 气镇旋转泵