Hydrolit羟甲亚磺酸钠, 甲醛次硫酸钠[汞中毒治疗药]hydron.水疗院；水力电pref.表示“水的”、“氢的”Hydrodesulfufization加氢脱硫hydro-logic system液压逻辑系统hydrometer aerometer[机] 量气计, 气体比重计hydro-vacuum brake液压真空制动器, 真空加力式液压制动器hydrostatic pressure液静压,液体静压力hydrogeological unit水文地质单元hydrologic geography水文地理学hydroxyalkanoic acid羟基烃酸hydrological indexes水文指数法hydrochloride-acid盐酸