用化学

• Elementary reform of experiment teaching of medical chemistry
  医用化学实验教学改革初探
• Photographic grade aluminum chloride solution
  摄影用化学药品.氯化铝溶液
• Gums and mucilages are not distinguishable chemically
  用化学的方法区分不出树胶和粘胶。
• Standard specification for chemical admixtures for concrete
  混凝土用化学混合物的标准规范
• Examination of water - formed deposits by chemical microscopy
  用化学显微镜作水沉积物的检验
• Photography chemicals - hydroxylamine sulfate
  摄影用化学药品.硫酸羟胺
• Photography chemicals boric acid , crystalline
  摄影用化学药品.结晶硼酸
• Photography processing chemicals - acetic acid
  摄影用化学药品.冰醋酸
• Photographic grade sodium metabisulfite na2s2o5 sodium bisulfite
  摄影用化学药品.焦亚硫酸钠
• Photography chemicals - potassium persulfate
  摄影用化学药品.过硫酸钾