| 摘要 |
FIELD: grinding materials. SUBSTANCE: picking sticks have bearing surfaces for mounting hummer heads. Inserting sockets for receiving hummer heads from the side of the base abut against the bearing surfaces. The hummer heads in the insert socket can be pressed by way of tightening wedge interposed between the bearing surface and back side of the hummer head. The tightening wedge is tightened in the radial direction with one or several tightening bolts and serves as a guarding member for the bearing surface. EFFECT: enhanced efficiency. 2 dwg |
