“drill circuit”的概念、定义、翻译、参考文献-科学参考

单词	drill circuit
释义	drill circuit [`dril ´sǝr·kǝt] ^{COMMUNICATIONS} A telegraph circuit used only to practice sending and receiving.
随便看	step soldering step strobe marker step tablet step test steptoe step trench step-up transformer step voltage regulator step wedge stepwise reaction sterad steradian steradiancy sterane sterba curtain stercobilin stercobilinogen Stercorariidae stercorite Sterculiaceae steregon stereo stereo- stereo amplifier stereoblastula

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