单词	方孔塞规
释义	方孔塞规 square plug gauge
随便看	double somersaults double-sonic speed double soon winch Double-sound firecracker double sound source doublesource double source double source array television antenna double source CT double-source CT double source double streamer method double source electron beam evaporation double source heat pump double source method double source single streamer method double source stock Double-source thoracic-diseases doubles over doublespace double space double-speed transmission double-spending double sphere double-space double spaced