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 vacuumpump.
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。
2
The tube is connected to either a hand-held vacuumpump, 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 。
3
The Hery Henry Milker is a hand operated vampire pomphand-operated vacuumpump.