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...
定期航班的数量正让空中交通指挥系统不堪重负。The volume of scheduled flights is straining the air traffic control system.空中救援行动的规模现在已经有所缩小。The air rescue operation has now been scaled down.他们需要等空中交通管制人员的放行。They have to wait for clearance from ...