If large facilities to ensure no oil, no oil pump need not choose ethnic groups, such as: water pump, molecular sieve adsorption pump, sputter ion pumps, heat pumps.

若设施宽大务求无油时，无须选各族无油泵，如：水环泵、分子筛吸附泵、溅射离子泵、高温泵等。

youdao

If large facilities to ensure no oil, no oil pump need not choose ethnic groups, such as: water pump, molecular sieve adsorption pump, sputter ion pumps, heat pumps.

若设施宽大务求无油时，无须选各族无油泵，如：水环泵、分子筛吸附泵、溅射离子泵、高温泵等。

youdao