n.虎头钳
vt.用虎头钳夹紧
A clamp or vise that holds a machine part in place or controls its movement or that holds two such parts together. 钳，夹夹子或老虎钳，用来固定机器部件到位、或控制其运动或把两个该种机件连接起来
n.维修
动词service的现在分词形式.
