我周五安裝一個rocking chair，用到rachet,發現它在狹小的空間裏非常好用，我感動的快哭了

來源: cnrhm2017 於 2025-05-04 14:47:09 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (526 bytes)
本帖於 2025-05-04 14:48:10 時間, 由普通用戶 cnrhm2017 編輯

美國機械設計和製造真的厲害。

 

In 1863, the American J.J. Richardson patented the first design for a ratcheting wrench with different-sized sockets that could be swapped out for each other. Originally, these wrenches had square-shaped sockets, as they were easier to make.

 

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