preharden翻譯，preharden的意思，preharden同義詞，preharden的反義詞，preharden短語詞匯

詞語：preharden

preharden的解釋

prehardenn. 預堅膜

preharden的意思

preharden 預堅膜;

preharden的詞匯及翻譯

n. preharden steel,prehardening - 預硬化鋼