An arm is affixed to the elongate member and pivotal at a mounting surface when the elongate member moves toward the second position.
当延长构件向第二位置移动时，臂与延长构件附接并在安装表面枢轴转动。
An arm is affixed to the elongate member and pivotal at a mounting surface when the elongate member moves toward the second position.
当延长构件向第二位置移动时，臂与延长构件附接并在安装表面枢轴转动。
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