| 摘要 |
Each of the blades (5) attached to the rotating plate of a machine for pointing floors and walls formed by panels, consists of a strip (11) of an elastomeric material having a very high resistance to wear. The strip is bonded by a rubber type polymer neoprene (pref. contact adhesive to a blade (13) formed from a corrosion resistant clock spring steel. Two other similar blades of steel (15) may be added or dispensed with according to the case. All blades pref. have a hole (17) for a screw by which they are fixed to the rotary plate. The assembly has a much longer lifetime. |
