合注井 multi-nozzle control air injector: 多喷嘴式增压空气喷射器multi-layer and multi-pass welding: 分层多道焊jet multi-layer dryer: 多层热风烘呢机multi layer co olidation: 多层固结multi layer consolidation: 多层固结下载手机词典可随时随地查词查翻译