metronn.蜜特龙metron.地铁adj.大都市的(METRO)麦德隆(财富500强公司之一总部所在地德国；主要经营零售).metrological guarantee计量保障Metrological equipment计量器具metrological precision计量精度metrological managment计量管理metro roiling- stock地铁车辆metrological-support计量保障metromidaxole membrane甲硝唑缓释药膜metro transfer station地铁换乘站metrological operation计量操作metrology grating disk计量图光栅