| 摘要 |
A welding apparatus for welding together arcuate components, for example a platform and web of a brake shoe comprises a pair of opposed clamping members which are relatively movable to engage the web, one on each side thereof, over a substantial portion of the web surface area. The clamping members are continuously rotated by suitable drive arrangement. Preferably, two such pairs of clamping members are provided for clamping respective webs.
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