CPC Subgroup
E01B 11/44 Non-dismountable rail joints; Welded joints (welding methods B23K)
Full Title
Rail joints (electrical connection of the rail B60M5/00) > Non-dismountable rail joints; Welded joints (welding methods B23K)
4 direct subcodes
Child Classifications
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- E01B 11/46 General methods for making gapless tracks
- E01B 11/48 Joints made by flame welding
- E01B 11/50 Joints made by electric welding
- E01B 11/52 Joints made by alumino-thermal welding