This paper mainly discusses the operation principle of hydraulic disc brake, the constitution of on-line examination and the designs of electric circuit, machine and software partial.

主要论述了液压盘式制动器的工作原理和在线检测系统的组成，以及检测系统电路原理、机械部分和软件部分的设计。

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I picked up the caliper and saw that the hydraulic brake line was severed, snapped off cleanly right at the banjo connection.

我拿起了卡尺，看到液压制动线断，干净利落地结束了在班卓琴权利方面。

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