Residual air . Generally referred to as the amount of air remaining in the lungs following exhalation.

残余空气(residualair):通常情况下指的是在人呼出气后,依然保留在肺部中的那部分空气.

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Existing residual air pressure after disconnecting the air compressor from the machine has to be expelled.

如有残留压缩空气时,应放掉压缩空气.

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