niobium造句
31. Niobic acid and compounds containing niobium are applied in a wide range of catalysis fields for their unique acidic property and thermal stability.
32. After niobium microalloying high carbon steel, the mechanical properties of wire rods was improved.
33. Analysis is made of the determination of chlorine in tantalum niobium composite.
34. The developments and current situation of tantalum - niobium hydrometallurgical extraction are presented.
35. This article described the determination of hydrogen in steel, copper, niobium, tantalum and titanium with ceramic crucible by high frequency induction-thermal conductivity method.
36. Niobium oxide optical thin films have been prepared by low frequency reactive magnetron sputtering system.
37. Among the high temperature nonferrous metals are molybdenum, niobium, tantalum, and tungsten.
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