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09
2019-10
Cross recessed countersunk wood screws, English name: wood screws are similar to machine screws, but the thread on the screw is a special wood screw w...
09
2019-10
The nut is a part that tightly connects the mechanical equipment. The nut of the same specification can be connected through the inner thread...
07
2019-10
The Greek mathematician Alcutas once described the principles of screws, screws and screws. In the first century AD, the Mediterranean world began to ...