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Use no oil vacuum pump, avoid polluting the environment in the production.
使用无油真空泵，避免污染环境的生产。
youdao
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It is important to solve the oil leak for the rotary vane vacuum pump.
解决旋片真空泵漏油是重要的。
youdao
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It is important to solve the oil leak for the rotary vane vacuum pump.
解决旋片真空泵漏油是重要的。
youdao