- 变: become different; change
- 向: direction
- 肘节: toggle; toggle joint; wrist
- 变向: changing direction; diversion; making the turn; reversing; veer
- 肘节: [机械工程] toggle; toggle joint; wrist 制动肘节 brake toggle; 肘节杆 angle lever; elbow jointed lever; toggle lever; toggle joint lever; 肘节开关 toggle switch
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