Carbon is needed as a reducing agent in many metallurgical operation.许多金属冶炼操作中需要碳作为还原剂.They point out inadequacies in applying criteria developed from metallurgical practice to reinforced plastics.他们指出了把冶金工业采用的断裂标准应用于增强塑...
They were taken to hospital suffering from smoke inhalation.他们因吸入大量烟尘被送往医院。Accidental inhalation of the powder can be harmful.意外的粉尘吸入可能有害。Septicemic listeriosis probably develops from ingestion or possibly inhalation of ...
During the investigation, this article uses varying methods of historic , documental, observational, conversational and questions surveyable.本文在研究中运用了历史法、文献法 、 观察法 、 访谈法和问卷调查法....