三层金属版用在层不同金属造成，能作极大印量的柯式印版。
Tri-metal plate Offset plate for very ling run work where three layers of metal are used in manufacturing the plate.
采用补充金属螯合离子，能部分恢复亲和膜对溶菌酶的吸附量，是实现亲和膜重复使用的有效方法。
Adsorption amount of lysozyme can be partly restored by addition of metal ions on the reused affinity membranes.
因此，双核茂金属催化剂的研发已经成为一个热点，大量的文献表明双核茂金属催化剂确实能改善聚合物的分子量分布，得到性能更为优异的聚烯烃材料。
The dinuclear metallocene catalysts, which have two diffeent active sites in one molecule, should be able to produce polymer with broader or bimodal molecular weight distribution.
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