?曲杆

... knee level 膝状曲线弯曲电平 knee lever 膝杆; 曲杆 knee pad 护膝垫 ...

?直角形杠杆

... 交角杠杆 angular lever 直角形杠杆 bell crank lever; bell-crank lever; knee lever; knee-lever; square lever 制动器直角形杠杆 brake bell crank ...