screw-thread form

Methods: Used to screw and form a silver amalgam core, re-porcelain dental restoration.

方法先用螺纹钉和银汞合金形成桩核, 再行烤瓷牙修复.

Lift mechanisms are arranged on the front running device and the rear running device which can be separated and can be inserted and fixed to form integration by a screw bolt and a screw nut.

前行路装置与后行路装置上均设有升降机构，前行路装置与后行路装置可分离，也可插接并用螺栓、螺母固定成一体。

This screw is for locking up the form.

这螺钉是用来固定铅字版的.

Expected to form a hydraulic, dumping up cylinder a ball valve materials, such as screw extrusion.

出料方式有液压 、 翻缸倾倒、球阀出料 、 螺杆挤压等.

The screw is for locking up the form.

螺钉用来固定铅字版.

Results show when the surface of the screw are treated by laser namo-alloy, alloy layer can form metallurgy combination, abrasion resistance of the screw surface is raised by 2. 2;

结果表明，螺杆表面进行激光纳米合金化复合处理后，合金化层与基体形成了牢固的冶金结合，表面平均硬度由原来的HV420提高到HV620，螺杆表面的的耐磨性提高了2.2倍；