The University of Maine arches, on the other hand, can be fabricated on site — the fabric inflated, bent around a simple form and infused with resin using a vacuum pump.
而另一方面，缅因大学的拱梁可以在现场构建——纤维布套充气、弯曲成简单形状，用真空泵灌注树脂。
The tube is connected to either a hand-held vacuum pump, or to an electric vacuum, and the pregnancy is removed.
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 Hery Henry Milker is a hand operated vampire pomphand-operated vacuum pump.
亨利的挤奶器是一个用手操作的真空泵。
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