已知双金属和三金属催化剂提供了优于单金属催化剂的性能。
It is known that bimetallic and trimetallic catalysts offer improved properties over single metal catalysts.
所用的催化剂是由氯化钯和三氯化铁加上第一主族元素的氯化物中的一种组成三金属体系。
The catalyst used is one three-metal system including palladium chloride, ferric chloride and the chloride of one first main group element.
讨论了三金属轴瓦镀层的电镀技术和质量检测，试验结果表明，所研究的电镀技术能满足轴瓦产品的要求。
In this paper, the plating technology and the quality checkout of plating-layer of trimetal bearing shell are discussed.
讨论了三金属轴瓦镀层的电镀技术和质量检测，试验结果表明，所研究的电镀技术能满足轴瓦产品的要求。
In this paper, the plating technology and the quality checkout of plating-layer of trimetal bearing shell are discussed.
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