there has no screw thread on the installation hole on head of water-cooling. It's difficult to install it by the screw tap which along the products.
产品有以下缺陷：水冷头上的安装孔没有螺纹，用配带的自攻螺丝安装非常困难。
2
We focus on describing the new processing technology of metallocene polyolefins and it's equipment in the aspects of the electro magnetic dynamic technology, internal cooling system, mold and screw.
从电磁动态技术、内冷系统、模头、螺杆各个方面重点阐述了茂金属聚烯烃新型成型技术及其装备。
3
The result shows that production of high strength screw bars is reasonable by the control rolling and control cooling process on high-speed wire mill with the capacity of low temperature rolling.