SB 9917 anti - weather acrylic acid polyurethane coating is two components anticorrosive coating.SB9917丙烯酸聚氨酯耐候漆是双组份、性能优良的防腐涂料.The WC - CO coating produced by electrospark deposition on alloy can effectively improve subs...
For multi - object contact problem in rolling engineering, the accuracy of disaggregation mathematical method is low.在多物体同时接触轧制工程问题中,对各物体抽象出来研究存在简化较多 、 计算精度低等缺点....