该导管或与手持真空泵联结，或与电动真空泵联结，然后移除胎儿 。
The tube is connected to either a hand-held vacuum pump, or to an electric vacuum, and the pregnancy is removed.
要约一种具有可调整长度的把手导管，并能在机身上引滑动的真空吸尘器把手固定结构。
The invention relates to a handle fixing device of vacuum dust-collector which has a handle tube whose length is adjustable and it can slide along the machine.
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