免费一级国产生活片,国产满18av精品免费观看视频,国内精品一级毛片免费看,一级毛片免费观看不卡的,一区二区三区视频免费观看,国产女人18毛片水真多18精品,麻豆精品一区二区综合av

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;