Rotary digging pick is a kind of construction machinery for hole forming operation in building foundation engineering. It is mainly suitable for the construction of sandy soil, cohesive soil, silty soil and other soil layers. It is widely used in the construction of cast-in-place piles, continuous walls, foundation reinforcement and other foundation foundations The picks of rotary drilling rig are referred to as rotary drilling picks and rotary drilling picks. The picks used for rotary drilling rigs are: BZ47-22, BZ47-19, BZ47-17, 3050-19, 3050-22, 3060, C21, C23, C31, C34, C35, RZ47, 3050, RZ223059, RZ29, RZ31, RZ40, RZ60, RZ65, RZ70, RZ72, RZ80, etc