三级**毛片,国产精品久久久久久久久久嫩草,国产精品久久久99,久久综合伊人一区二区三,久久久噜久噜久久综合,欧美伦理电影在线免费观看,丁香久久综合

DMM60 submerged arc welding machine (single wire) is a dual-purpose welding equipment specially designed for welding "H" or "T" steel and welding box beams after replacing the weld tracking frame. advantage:

1. One machine with dual purposes, can weld H-shaped steel and box beams, easy to operate, and large range of welding seam tracking ;

2. Using heavy-duty seam tracking device, the welding seam is more uniform and smooth;

3. Efficient flux recovery system can recover and separate the flux more effectively, and can be reused;

4. Highly automatic, reliable work status, simple structure, easy for operation and maintenance;

5. The drag chain is placed in longitudinally, and the welding machine and the workpiece holder are directly connected with a large-section cable, which effectively improves the welding quality;