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...
Female teacher is wiping the tear of canthus, you come even, be?女老师抹著眼角的泪水, 你还要来一次, 不是 吗 ?She was taking tiny bites of a hot dog and daintily wiping her lips with a napkin.她小口地吃着热狗，用餐巾优雅地擦着嘴。He was wiping his hands on an...