呼气，抬左臂向上进入扭转侧三角伸展式。
Exhale raise the left arm up into this variation of Reverse Extended Side Angle.
角一般都是成对的，在头部两侧一边长一个。
大多数飞行状态都要求保持侧滑角等于零。
In most flight conditions it is desired to maintain the sideslip Angle equal to zero.
可加工各种规格底块、侧块、角块。
Machinable specifications at the end of block, side block, corner block.
可加工各种规格底块、侧块、角块。
Machinable specifications at the end of block, side block, corner block.
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