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凹凸印刷
āotūyìnshuā
1. embossing
2. die stamping

Character Breakdown

凹
āo
concave, hollow; depressed; pass, valley
HSK 6 5 丶
凸
tū
to protrude, to bulge out; convex
HSK 6 5 丶
印
yìn
print; mark; seal, stamp
HSK 4 5 丶
刷
shuā
brush; to clean, to scrub
HSK 3 8 丶

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