加热室是多晶硅铸锭炉的关键部件之一.Heating chamber is pivotal part of the polycrystalline silicon ingot production furnace.沸腾钢在铸锭前不脱氧或轻度脱氧.In the case of rimming steel, no or some deoxidation is carried out before casting.常规DC铸造7050铝合金铸锭...
Objective To study the purification process of total flavonoids in Lignum Dalbergiae odoriferae with macroporous resin.目的考察大孔吸附树脂分离纯化降香总黄酮的工艺条件及参数.Objective : To establish the GC fingerprint of the Volatile Lignum Dalber...
I have here at my side Mr. Glenn Williams.我身边这位是格伦·威廉斯先生。It is no easy job to run against John Glenn, Ohio's Democratic senator...和俄亥俄州的民主党参议员约翰·格伦竞选绝非易事。I have here at my side Mr. Glenn Williams...我身边这位是格伦·威廉斯先生。Su...