6 5 8 x 20 July 8, 2019 16 32 64 128 7 8 5 6 x 9 20 20000 6 x 5 8 wood screws 10 8 ) 6 x 20 5 5x 8 5 x 20 )= 18 2x 6 6 ×8 20 x 6 5
