词汇	返波管
释义	返波管医backward wave tube
随便看	direct signal leakage direct signalling equipment direct signal monitoring direct silk screen printing direct simulation Direct Simulation Frequency Synthesis Direct simulation Monte Carlo Direct simulation Monte-Carlo direct simulation monte carlo method direct simulation Monte-Carlo method direct single-bit serial-scan path direct singularity direct sintering direct sizing direct skid sensing direct skin flap direct skin grafting direct sky blue direct sky blue 6b direct slanderous abuse against sb direct slice direct slicing direct smash direct smear direct smear method