- roller electrode
- seam-welding electrode
- welding wheel
- 滚轮: contact roller; trolley whee ...
- 电极: electrode; pole
- 滚轮电车接电轮: trolley wheel
- 电极滚轮: seam welding electrode wheel; seam welding wheel; welding wheel
- 滚轮式电极: roller electrode
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