A、A.worn bearings and piston pins
B、B.slugging due to flooding back
C、C.too much oil in circulation
D、D.All of the above
更多“Noise in a refrigeration compressor can be caused by （）.”相关的问题
A、the signal to noise of the current optical amplifier B、the signal to noise of the previous amplifier or source C、the signal to noise introduced by the optical multiplexer D、the accumulated noise to signal ratio of the optical channel
A、signal strength 46dBm, noise level 95dBm B、signal strength 74dBm, noise level 94dBm C、signal strength 68dBm, noise level 79dBm D、signal strength 50dBm, noise level 56dBm
A、 the signal to noise of the current optical amplifier B、 the signal to noise of the previous amplifier or source C、 the signal to noise introduced by the optical multiplexer D、 the accumulated noise to signal ratio of the optical channel
A、A. signal strength 5dBm B、B. signal strength 6dBm C、C. noise level 4dBm D、D. noise level 5dBm
A、A. Signal strength 0dBm， noise level 6dBm B、B. Signal strength 8dBm， noise level 9dBm C、C. Signal strength 4 dBm， noise level 4 dBm D、D. Signal strength 6dBm， noise level 5 dBm
A、noise and vibration B、an increase in discharge pressure C、an increase in suction pressure D、lifting of the relief valve
A、-40dBm signal and -90dBm noise B、-50dBm signal and -90dBm noise C、-30dBm signal and -90dBm noise D、-20dBm signal and -90dBm noise
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