多层电镀 layer plating: 夹层培养法double layer plating: 复层涂敷, 双层涂覆layer plating method: 夹层培养法; 夹层平血培养法multi-layer and multi-pass welding: 分层多道焊jet multi-layer dryer: 多层热风烘呢机下载手机词典可随时随地查词查翻译