内孔撑圆涨紧夹具

{"name":"\u5185\u5b54\u6491\u5706\u6da8\u7d27\u5939\u5177","type":"\u65c5\u6e38\u7247","area":"\u7f8e\u56fd","year":"2008","lang":"\u95fd\u5357\u8bed","play":"\u9ad8\u6e05\u4e2d\u5b57","type1":"\u65c5\u6e38\u7247"}