凸边铆钉. 与其他铆钉端点结合使用.Collar head rivet. Use in conjunction with other rivet ends.逆时针 旋开调节钮使外面带有凸边的环松动.Release the outer knurled ring by rotating the clamping screw anti - clockwise ....
石灰石必须煅烧到这样地步.The limestone must be calcined in such a way.为了煅烧碳酸钙细粉, 已经成功地应用了高温成球技术.In order to calcine calcium carbonate fines, the technique of high - temperature pelletization has successfully been used.已证实研制通过煅烧可再生的活...