短語詞組短語spur -gears 直齒圓柱齒輪spur bevel gears 直齒錐齒輪Straight and spur gears 可測量直線正齒輪asymmetrical involute spur gears 非對稱漸開線直齒輪Nonstandard Spur Gears 變位齒輪概述SPUR & HELICAL GEARS 圓柱齒輪Spur Gears &Rack 齒輪齒條傳動involute spur gears 漸開線直齒輪 返回 spur gears