7 1 2 x 20 July 8, 2019 16 32 64 128 7 20 1 2 x 3 20 165 x 1 7 1 2 x 20 mm 1 2 20 x 7 bolt 2 x 20 1 7 cubed 2 x 20 1 7 to the power of 3 7 16 20 x 1 2 bolt 7 16 20 x 1 2 7 16 20 x 4 1 2 bolt 7 16 20 x 2 1 4 7 16 20 x 3 1 2 7 16 20 x 2 1 2 hex bolt 1 3 x 3.14 x 7 2 x 20 7 20 1 2 chia x 3 phần 20 7 1 2 5 3 4 x 8 0 20
