In order to reduce the drag torque under high speed conditions. the equivalent radius is introduced into the traditional low speed torque model of a wet clutch with track vehicle. and the calculation model of the drag torque with radial groove is derived. An optimization design model is established with 3 working condition parameters of the clutch and 5 structural parameters of the fr... https://homehardware4ues.shop/product-category/wardrobe-door-hardware/