taper fitting bit
基本释义
锥形联接钻头
实用场景例句
历史场景
The old switchboard operator connected calls manually in the 1960s.
在20世纪60年代，老式交换台操作员手动接通电话。
技术发展
The telephone switchboard has been replaced by digital systems.
电话交换台已被数字系统取代。
职场回忆
She worked at the main switchboard during the company's emergency drill.
在公司紧急演练期间，她在总交换台工作。
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