小蓮!你為什麼要這樣?!
Etching - Wikipedia, the free encyclopedia孩子提早面對人生的殘酷... Etching is the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio in the metal (the original process—in modern manufacturing other chemicals may be used on other types of material). ...
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