welded steel pipe for supporting roller of belt conveyer
Related Translations:
电焊: (电弧焊接) electric(al) welding; electric soldering; electrowelding◇电焊工 electric welder; 电焊机 electric welder; electric [arc] welding machine; 电焊条 welding rod; (arc) welding electrode; 电焊遮光罩 we