drive loop的用法和樣例：
例句
- A keyway is machined on the outer race for the connection to the drive or drive member centered on its outside.
外環有鍵槽用來與驅動件或被驅動件結合，並以外環為固定中心線。 - You can control the motor moving left and right on the curtain staff to drive the window curtain close or open eadily by pressing the button of the controller only.
使用時，只需輕輕一按遙控器或線控器按鈕，控制器即指揮電機在滑桿上左右運動，電機通過窗帘環驅動窗帘開閉。
