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The neutral seat reference point was defined coordinate origin, then reach basket envelopes data of American air force men was converted to that of Chinese with coordinate transform.
以座椅参考点为坐标原点，采用坐标变换的方法将美国军用飞机飞行员的上肢可达区数据转换成中国歼（强）击机飞行员上肢可达区的近似数据；
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