A friction plate with a hole for connecting piece of axle is superposed on the armature.

一摩擦片，叠置于衔铁上，中央具连轴块孔；

youdao

Main clutch: normally opened, multi-plate, powder metallurgy friction plate and hydraulic booster control.

离合器为常开式、多片湿式粉末冶金摩擦片、液压助力操纵。

youdao

Troubleshooting method is to unload the disc brake clamp 1, the friction plate 4 and 3 to remove dust ring, re-connect tubing connector;

排除故障的方法是，卸下盘式制动器夹钳1，将摩擦片4和防尘圈3取下，重新接上油管接头；

youdao

What's more, a machine-made surface produces the wrong kind of friction: to do its job precisely, the plate's surface needs minute scorings, of only a few microns each, where machine oil can reside.

CNN: ASIANOW - TIME Asia | GizmoLand! | Man Beats Machine