长输管线系列球阀不仅选材广泛且内件材料均采用表面镀镍或是316材质、密封圈采用特制的聚合物材料。
Pipeline series ball valve is not only wide selection of parts and materials are used in nickel-plated or 316, seal with a special polymer material.
铅锌、锰、金、镍等矿产资源系列产品等，形成了上下游与跨行业相互关联及延伸的五大支柱性产业链，供应着中国以及世界市场。
With these products series, five mainstays of upper & down streams and multi-industry interrelation are formed, supplying domestic and international markets.
本文利用浸渍法制备了一系列不同载体的镍基催化剂，并将其用于苯的羟基化反应。
A series of Ni-based catalysts with different supports were prepared by impregnation method and tested in the hydroxylation of benzene to phenol.
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