Composite structure tappet compos ed of s teel body and ceramic disk has a better wear resistant and wear properties ,and servi ce ability than the using alloy tappet.

• 复合陶瓷挺柱由于其优越的耐磨与减磨性能而成为取代现有合金挺柱的最佳材料，尤其是在使用条件苛刻的发动机中。