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(less than or equal to ~10 µm) is known to be a prerequisite for superplasticity, ultrafine-grained MMSs have high potential for showing excellent superplastic ductility. Nevertheless, until now only DSSs and UCSs have been studied as iron-based superplastic materials13,14,15,16,17,18,...
mercury sulphide [ˈmə:kjuri] [ˈsʌlfaɪd] 硫化汞 magnesium [mægˈni:zi:əm] 镁 non-ferrous [ˈferəs] metals 有色金属 by products 副产品 impurity [ɪmˈpjʊərɪti:] 杂质 distillation [ˌdɪstəˈleɪʃən] 蒸馏 ...
A. that are attracted by magnets B. that magnets are attracted by them C. attracted by magnets D. magnets that attract them 相关知识点: 试题来源: 解析 A 只有这样,才能排除干扰,选定正确选项。 提示: 尽管有生词,但是一定要学会确定生词在句子中的地位及其词类和大概意义。
between the lining metal and the base metal by electric spot, or line, resistance welding a depth of the metal of the base and a depth of the metal of the lining at the interface of the metals is fused, the fused metals commingle and upon solidification unite the lining and the base. ...
Iron is an essential micronutrient involved in many biological processes and is often limiting for primary production in large regions of the World Ocean. Metagenomic and physiological studies have identified clades or ecotypes of marine phytoplankton that are specialized in iron depleted ecological niches...
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