'聚'.''氨脂一种氨基甲酸中除''.'乙基'.''酯以外的酯.Any of several esters, other than the ethyl ester, of carbamic acid.适合各种聚氨脂 ( PU ) 发泡成型产品.Suitable for all kinds of polyurethane ( PU ) fo...
Target function, design variables, nature state restrains, Optimize methods are studied.分析了高土石坝优化设计的目标函数 、 设计变量 、 约束条件及优化方法.Its enlargement factor arrives to 160,000 because it restrains noise effectively.由于选频滤波放大电路对噪声的有...