“manual exchange”的概念、定义、翻译、参考文献-科学参考

单词	manual exchange
释义	manual exchange [`man·yǝ·wǝl iks`chānj] ^{COMMUNICATIONS} Any exchange where calls are completed by an operator.
随便看	sac saccadic movement saccate saccharase saccharimeter saccharin saccharoidal saccharolactic acid saccharometer Saccharomycetaceae Saccharomycetales Saccharomycetoideae saccharopinuria saccharose Saccoglossa Saccopharyngiformes Saccopharyngoidei saccular aneurysm sacculus saccus sac fungus sack cloth sackungen Sackur-Tetrode equation sacral block

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