- belling
- embossing
- 压: press; push down; hold down; ...
- 凸: bulge; protrude
- 压凸印: embossing
- 调压凸轮: compression relief cam; compressionreliefcam
- 减压凸轮: decompre ion cam; decompression cam; half compression cam; half-compre ioncam; half-compressioncam; relief cam
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