供应 dt8a纯铁硬度是多少？ dt8a 图片

p1Src=//y3.yzimgs.com/uploads/533820/2018102-154111260.jpg?watermark/2/text/5Lic6I6e5biC5YW05pyb6YeR5bGe5p2Q5paZ5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/650/fill/I0E3QTlBOA==/gravity/SouthEast"