With materials and method, art creates visual images in three dimension or plane to reflect social life and express artists feelings, so that it shows its special social function.
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The cationic rosin was synthesized by solvent method, with rosin, trimethylamine and epoxy chloropropane as raw materials.
采用松香、三甲胺和环氧氯丙烷为原料，溶剂法合成了阳离子松香。
Responsible to define specifications and test method for all materials concerned with production, review the quality specification, SOP and the other documents, revise, implement them and etc.
负责制订与产品相关的物料的检验项目和检验方法，审核质量标准、SOP和其它文件，及其修订、实施等。
This test method covers the determination of the change of resistance with temperature of metallic materials for electrical heating, and is applicable over the range of service temperatures.
本试验方法适用于电热合金随温度变化的测量，亦可用于超过电热合金使用温度范围的情况。
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