Cam shaft and tappetbody are important parts of engine, their status will influence directly whether or not the engine could make normal operation.
凸轮轴和挺杆体是发动机的重要零件，它们的状况直接影响着发动机能否正常工作。
2
The utility model discloses a combined hard alloy tappet which includes a tappetbody whose one end surface is provided with a concave platform inside which is connected with a hard alloy slice.