positive displacement oil-sealed liquor pump的意思|示意
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容积式油封液泵
positive displacement oil-sealed liquor pump的网络常见释义
油封式正位移式打液泵 ...油封式旋转机械真空泵 rotary oil sealed mechanical pump 油封式正位移式打液泵 positive displacement oil-sealed liquor pump 油封填料函 oil-sealed stuffing box ..