DIFF Subgroup
B21K 7/04 switch tongues
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Making railway appurtenances; Making vehicle parts > parts for permanent way > switch tongues
CPC:
Making railway appurtenances; Making vehicle parts > parts for permanent way (spikes B21K1/72) > switch tongues
No child classifications to compare. This is a leaf node in both IPC and CPC.