... 3.long using life 4.keep the bus moving smoothly shock absorber for yutong buses 1.stable resistance2.Firm structure, with long life ... when using it4.easy to install and use.Working principle Shock Absorber, piston reciprocating motion of the cylinder, the fluid in the ... and parts, brake drum, brake pad, brake disc, clutch, clutch cover, clutch booster ,brake shoe and many other chassis parts . We ...