“使有效”用英语怎么说？

使有效的P7完全地顺时针旋转, P2和P4完全地相反地顺时针.Rotate the potentiometer P 7 completely clockwise, P 2 and P 4 completely counter clockwise.新型助推器能使有效负载增加120%.New booster can increase the pay load by 120 %.长方形工作室,使有效容积达到最大.The working cha...