“clearing-out drop”的概念、定义、翻译、参考文献-科学参考

单词	clearing-out drop
释义	clearing-out drop [`klir·iŋ ´au̇t ´dräp] ^{COMMUNICATIONS} Drop signal associated with a cord or trunk circuit, which is operated by ringing current to attract the attention of the operator.
随便看	D line D-loop DM DMA dma DMB DMC DMDT DME D meson DMF DMSO DMT DMU DNA DNA fingerprinting DNase dneprovskite D nickel Dobbin's reagent dobby loom Dobrowolsky generator Dobson prop Dobson spectrophotometer Dobson support system

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