CPC Subgroup
E21D 15/566 Full Title
Props (in the building art E04G25/00); Chocks > Component parts or details of props (E21D15/43, E21D15/58, E21D15/60 take precedence) > Details of locks of telescopic props
E21D 15/566 Props (in the building art E04G25/00); Chocks > Component parts or details of props (E21D15/43, E21D15/58, E21D15/60 take precedence) > Details of locks of telescopic props