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| | Hot-melt adhesives based on copolyamides for textiles which have the characteristics of low-melting,large,adhesive bond strength and excellent resistance to washing and dry-cleaning(trichloroethylene or gasolene).The copolyamides consisting of at least three different monomer units are produced by melting polycondensation in the following compositions:(1) laurolactam,(2)caprolactam,(3)hexamethylenediamine salt of adipic acid and(4)hexamethylenediamine salt of sebacid acid or 11-aminoundecanoie acid et al.Th... | | 由共聚酰胺组成的织物用热熔胶粘剂具有低熔点,粘结强度大,耐水洗性能优良和耐干洗(三氯乙烯,汽油)性能显著等特点。此共聚酰胺是由三种以上不同单体组分通过熔融缩聚来制备的,其成分如下:(1)月桂内酰胺,(2)己内酰胺,(3)己二胺己二酸盐,(4)己二胺癸二酸盐或11-氨基+-酸等。该共聚酰胺的相对粘度为1.3~1.7,熔点为80~130℃. | | 文摘来源 | | The conception of reformulated gasoline which was proposed in order to improve the state of air pollution caused by the vehicle exh- aust was introduced in detail.The differences of properties between conventional gasoline and reformulated gasoline were compared.The effects of reformulated gasoline production on the processes of conve- ntional gasoline production and the opportunities for new catalyst development were discussed respectively. | | 本文详细介绍了为改善汽车废气对空气污染的情况而提出的改制汽油概念。对传统汽油与改制汽油的性能差别作了比较,讨论了生产改制汽油对传统炼油厂生产工艺的影响和新催化剂开发的领域。 | | 文摘来源 | | A serial tests have been performed for the CA6102 type engine of a currently used Jiefang model CA1091 truck.They are:working procedure test;universal performance test;optimum ignition advance angle test;air fuel ratio measurement;gasolene property rig test and road test while burning high octane number fuel.Based on result of these tests,technical scheme and measure for further reducing fuel consumption are discussed from different respects. | | 对在用的解放牌CA1901型载货汽车装用的CA6102型发动机进行了工作过程试验、万有特性试验、最佳点火角试验、空燃比测量、燃用高标号汽油性能台架试验与道路试验。通过这些试验,从不同角度探讨进一步降低其燃料消耗的技术方案及对策 | | 文摘来源 | |   | | << 更多相关文摘 |
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