短語詞組短語Standard involute spur -gear 標準漸開線直齒輪involute -column-bevel gear 漸開線圓柱斜齒輪non -involute gear-tooth profile 非漸開線齒廓involute straight -teeth bevel gear 漸開線直齒圓錐齒輪dual -involute gear reducer 長線齒輪減速器 返回 involute gear