DIFF Subgroup
E21D 17/10 Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates
Introduced: September 1968
Full Title
Caps for supporting mine roofs > Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates
No child classifications to compare. This is a leaf node in both IPC and CPC.