德国KSL粉尘DIN 40050试验灰 DIN 40050 上海瑞贝贸易有限公司

p1Src=//y3.yzimgs.com/uploads/312653/2018418-152426428.jpg?watermark/2/text/5LiK5rW355Ge6LSd6LS45piT5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/500/fill/I0E3QTlBOA==/gravity/SouthEast