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包括缺角、胚饼用错、正背面复打及模具锉痕等。
Errors include edge clips, COINS struck on foreign planchet, flip over double strikes, and filled dies etc.
youdao
-
包括缺角、胚饼用错、正背面复打及模具锉痕等。
Errors include edge clips, COINS struck on foreign planchet, flip over double strikes, and filled dies etc.
youdao