Product advantages:
Using a 100mm x 30mm soft lap rubber strip attached to the lap steel mold at the end of the trolley, the non lap part is 15mm higher than the trolley panel. When the trolley moves to the second lining working surface of the next board, the lap surface of the trolley contacts the lap part of the lined concrete, and the soft lap rubber strip is squeezed flat with the surface of the trolley mold board.