关于设计要求的一句话? lever operated valves shall have throttling levers of the notched plate design to allow positive positioning in a maximum number of intermediate positions. 句子的整体大意为:手柄操作的蝶阀,其手柄的设计应使带有能够在阀门半开位置时准确定位的卡槽结构。就好比插图这种结构(仅作参考,希望更专业的人士替你解答,谢谢!)查看更多