The optimum design of the controller of compound active noise cancellation earmuff is discussed.探讨了复合式有源消声耳罩的控制器的优化设计方法.We need at least 24 hours' notice of cancellation.如欲取消，请至少提前24小时告知。The cancellation of the foot...
各种各样用来生产彩色油墨的色料也发展起来了.Various new pigments for producing colored inks were also developed.漆布一般由底基层,色料层和光漆层组成.Current uses by subbase layer and color pigments , varnishes tier.未添加任何的添加剂例如糖精, 色料或者防腐剂.Free from, any additiv...