Main products are drill and screw, which almost cover all the sizes and configurations.
主要产品是钻头和螺杆，我们提供几乎所有型号和结构。
The limitation diagram of key structural elements in design of screw-press for various materials and sizes is given through the data investigation of die forging on screw press.
本文通过对作者所在单位的螺旋压力机上模锻件的数据调查，给出了设计所需的各种材料和尺寸的结构要素极限图表。
Since conventional screw classifiers have a lower efficiency, it is difficult for them to control their product sizes, affecting directly ball mill's throughput capacity and final separation results.
由于传统螺旋分级机的分级效率较低，分级产品的粒度难以控制，从而直接影响球磨机的处理量和最终的选别指标。
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