腹直肌使躯干前弯向直腿。
拉链前襟，延展性后背设计，轻便前弯衣袖，拉链袖口带钮扣。
Zipper front, action back, slightly pre-curved sleeves, and zipper cuffs with snap. Adjustable snap tabs at waist.
验证了前弯叶片相对直叶片提高效率、扩大稳定工作范围的实验结果。
The conclusion that the forward skewed rotor has a higher efficiency and wider off design performance is validated once more.
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