Since the rotating joint is supported by the simple bearing, the main part of the rotation-angle control device can be replaced on the body and be driven to rotate.
由于转动关节可以采用简单的轴承座支承，转动角的驱动主体部分可以放置于身体之上，通过传动驱动其转动。
Since the rotating joint is supported by the simple bearing, the main part of the rotation-angle control device can be replaced on the body and be driven to rotate.
由于转动关节可以采用简单的轴承座支承，转动角的驱动主体部分可以放置于身体之上，通过传动驱动其转动。
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