发明授权
US3612213A Silent housing for air pumps and compressors 失效
空气泵和压缩机的静电容器

Silent housing for air pumps and compressors
摘要:
A silent housing for air pumps and compressors is of sounddeadening material and has an air inlet filter, a pair of air intake resonant valves tunable to an upper frequency of the pump or compressor, and a pair of outlet valves tuned to the same frequency as the intake valves and discharging in opposite directions into a common outlet channel for sound interference.
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