一些业内人士认为齿轮传动窝扇发动机最终可能降低燃油消耗达20- 25%。
Some in the industry think geared turbofans could eventually reduce fuel consumption by 20-25%.
变传动比汽车转向器齿扇是变模数的非圆齿轮。
The gear sector of variable transmission ratio in automobile steering mechanism is a variable module non-circular gear.
变传动比汽车转向器齿扇是变模数的非圆齿轮。
The gear sector of variable transmission ratio in automobile steering mechanism is a variable module non-circular gear.
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