... making the connection plate without using nails Connecting fitting,Furniture Connector,Plate ConnectorsTechnology:This utility model relates to a ... of the inner cavity are consistent with the helical screw alveolus. Taking into account the increase of the connecting ... 9, plywood, 10 journal sets, 11, spiral groove, 12, screw, 13, interconnect, 14, interconnect. Specific way of implementing As shown ...