... under lapped valve 负遮盖的阀 lapped finish研磨加工 lapped butt 端搭接,搭接...
双语例句
1
Ground and lapped to 2 RMS finish after weld-in.
焊接装配后，进行研磨，抛光精度达到2 RMS。
2
Seat rings are long to compensate for temperature fluctuations and are seal - welded. seating faces are hardfaced with stellite 6, ground and lapped to mirror finish.