3D-Printed Two-Way Screw Threads Both Ways!の無料動画を見ましょう
アニメーションの説明：
This unique 3D-printed screw has the ability to thread bolts on it that go both clockwise and counter-clockwise. So cool when you think about it!
This unique 3D-printed screw has the ability to thread bolts on it that go both clockwise and counter-clockwise. So cool when you think about it!