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در موارد مختلفی نیاز به افزایش یا کاهش گشتاور خروجی موتور می باشد. در یک اهرم، می توان مزیت مکانیکی اهرم و همچنین نیروی محرک را با تنظیم طول بازوی محرک، کم و بیش کنیم. گشتاور تولید شده در یک موتور را نیز می توان به صورت مشابه این روند، با استفاده از چرخ دنده، کاهش و یا افزایش داد. وقتی نیرو ثابت نگه داشته میشود، سرعت و گشتاور حالت معکوس پیدا میکن...
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