low sound level pump 低噪音泵 ; 低乐音泵
low sound level pump coupling 低噪音泵联轴器
low sound level pu 低噪音泵
Alarms-Low Sound Level 懋懿有限公司
In numerous medical applications its principal assets are its reliability, its low sound level and its economical aspect.
在许多医疗应用其主要资产是其可靠性，它的低噪音水平和经济方面。
At ground level, such vibrations-akin to low-frequency sound waves-are very small, only about the size of the vertical motions that produce them.
在地表，这种类似于低频声波的振动非常小，只相当于造成它们的垂直振动的幅度。
The calculated results show that strong vibrating source, low gravitational level and sound medium with large density and small sound speed will enhance the levitation ability.
结果表明，提高声源强度、降低重力水平或者采用密度大声速小的气体介质有利于提高声悬浮能力。
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