运动员在比赛中表现出坚韧的斗志.The athletes displayed great tenacity throughout the contest.用于提取这种油的树脂取自于一种矮小坚韧的树。The resin from which the oil is extracted comes from a small, tough tree.棍子落下去,他觉得好像打在坚韧的橡胶上.He felt the rubbery solidity...
万能卡盘只有三个爪.The universal chuck has only three jaws.重要的是用冲击式电机钻孔时别使用传统卡盘.It is important not to use conventional chucks for hammer drilling.该产品是手动好的单动卡盘,短圆柱连接型.The product is a hand - operated independent chuck, with cylin...