closedadj.关闭的；封闭的；停业的动词close的过去式和过去分词.closed star闭星形closed list封闭列closedcyclen.封闭式循环closed bids密封递价closed goaf封闭采空区closed yoke闭合轭closed film闭合膜closed hull闭壳closed bloc封闭集团closed shopn.只雇用某一工会会员的工厂(或商店)

1. The dynamic stress concentration problems at the swallowtail on a hammer forging die are investigated by using the dynamic photoelastie method.
   用动态光弹性法研究了锤锻模燕尾的动态应力集中问题。