细集料砂当量试验仪 SD-2B 北京纽利德科技有限公司

p1Src=//y2.yzimgs.com/uploads/336058/202156-104226479.jpg?watermark/2/text/5YyX5Lqs57q95Yip5b6356eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/500/fill/I0E3QTlBOA==/gravity/Center