CPC Subgroup
E21D 15/43 Details of wedges (friction linings or pads E21D15/42)
Full Title
Props (in the building art E04G25/00); Chocks > Telescopic props (general means for fixing telescopic parts together ) > with parts held relatively to each other by friction or gripping > Details of wedges (friction linings or pads E21D15/42)
1 direct subcode
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