double acting pump 双动泵 ; 复动泵 ; 双作用泵
Single-acting pump 单动泵 ; [机] 单作用泵
simplex double acting pump 单缸式复动泵
single acting pump 单作用泵
duplex double acting pump 双缸复动泵 ; 复式双动水泵 ; 双缸双作用泵
indirect acting pump 间接抽动泵
direct acting pump 直接作用泵 ; 直接联动泵 ; 直动泵
triple-acting pump [机] 三动泵
double acting piston pump 双作用活塞泵 ; 双效用活塞泵 ; 双作用式活塞泵 ; 双程活塞泵
direct acting steam pump 蒸汽直动活塞泵 ; 直动蒸汽泵
Possibly, the nanotubes are acting as analogues of the natural protein channels that pump water in and out of cells.
纳米管的作用可能类似于天生的蛋白质通道，用来帮助水进出细胞。
Aiming at how to reduce the pump noises, a new type of double acting piston radial pump with lower noises is designed here.
就针对如何降低泵的噪声问题，本人设计出了一种新型的低噪声双作用径向柱塞泵。
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