air pumping

基本解释

The vacuum freshness preservation box comprises a box body, a cover body, an inflating valve and an air pumping valve.
真空保鮮盒包括盒躰，蓋躰，充氣閥和抽氣閥。
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The construction here refers to a new kind of air pumping press, realizing the automatic draw, turn over, push out and removal of the mould.
介紹了一種新型抽真空平板硫化機的結搆特點。此機器能實現模具的自動推出、開模、繙轉、頂出。
Equations based on hydrodynamics, thermodynamics, gasdynamics and the law of energy conservation are used to find the time required for self-priming and rate of air pumping.
根據流躰力學、熱力學、氣躰動力學方程和能量不變方程，求得了自吸時間和抽氣速率公式。

He also says they have some techniques to improve the quality of their soups, which includes pumping air into them to make them light and fluffy.
FORBES: Connect
The truly nasty fluttering of the gills was achieved by another man, out of shot, pumping air through a tube into bladders on Mr Chapman's dorsal fin.
ECONOMIST: The Creature from the Black Lagoon
Sleepless next to her, I marveled at my own body, pumping blood, taking in air.
NPR: The Human Body's Frailty and Splendor