radial_size_dimension (T1)
radiused_bead_end_type (FF2)
radiused_slot_end_type (FF2)
rectangular_boss (FF2)
rectangular_closed_pocket (FF2)
rectangular_closed_profile (FF2)
rectangular_offset_pattern (FF2)
rectangular_omit_pattern (FF2)
rectangular_open_pocket (FF2)
rectangular_pattern (FF2)
rectangular_size (E1)
recyclability_property (PR1)
reference_plane (T2)
replaced_definition_relationship (S3)
replaced_usage_relationship (S7)
replicate_base_assignment (FF2)
replicate_feature (FF2)
retention_period (S4)
rib_feature (FF2)
right_angular_wedge (G7)
right_circular_cone (G7)
right_circular_cylinder (G7)
round_hole (FF2)
rounded_u_profile (FF2)
roundness_tolerance (T2)