A coating film improved in the property of being hard but apt to chip, which is inherent in chromium nitride coating films deposited by ion plating. The coating film is excellent in wearing resistanceand seizing resistance, the level of which is required to increase more and more in diesel engines. It further has excellent unsusceptibility to chipping.
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Because the excellent relationship which exists between our countries can only be cemented further if it has the ownership of the youth on both sides.
因为有了来自两国年轻人的努力，已存在于中巴两国间的友好关系必然会更加牢固。
Experimental results showed that the properties of crosslinked adhesive of PVA are superior than those of polyvinyl acetal adhesive. Further-more, it has innoxious to people, it is a excellent en...
实验结果表明，交联后的聚乙烯醇粘合剂性能优于聚乙烯醇缩醛粘合剂，而且无毒无害，是一种优良的环保材料。
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