词汇	police used
释义	police used 譬用
随便看	reciprocation cycle reciprocation duplex pump reciprocation engine Reciprocation follows only defrayal reciprocation force reciprocation internal combustion engine reciprocation mass reciprocation motion reciprocation parts reciprocation pipe reciprocation piston cooling pipe reciprocation piston pump reciprocation plant reciprocation pump reciprocation pump in series Reciprocation pump with unidirectional pistons reciprocation refrigeration compressor reciprocation rod reciprocations reciprocation scavenge pump reciprocation single piston pump reciprocation steam engine reciprocation stoker-fired reciprocation to environment reciprocation tube