pumping speed of vacuum pump
真空泵的抽速
以上为机器翻译结果，长、整句建议使用 人工翻译 。
One of the 4 items decided at the vacuum trade meeting in 1974 was to raise the pumping speed of oil booster pump following the raise of sucking pressure.
1974年真空行业会议确定四大攻关项目之一是油增压泵对应高吸入压强提高抽速。
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