基本解释[医药科学]瓷套冠瓷甲冠词组短语短语PJC Porcelain Jacket Crown 瓷套冠alumina porcelain jacket crown 铝瓷冠Aluminous Porcelain Jacket Crown 铝瓷甲冠专业释义医药科学瓷套冠瓷甲冠