The multi-step approach makes this artificial heart much cheaper to build than those that use compressedair to pump the blood.
与使用电池动力压缩空气将血液输送到全身的装置相比，新型人造心脏的造价更加低廉。
2
Modern artificial hearts are less cumbersome, but they are still rather unwieldy because they use compressedair to pump the blood and are powered by heavy batteries.
In powder coating process, compressedair the energy release of the expansion can ascend and fluidization powder, the powder pump out in from hopper and through the hose transported to the gun.