331-251，花键千分尺，MITUTOYO三丰 331-251 北崎国际贸易（北京）有限公司

p1Src=//y1.yzimgs.com/uploads/515533/2017531-10529454.jpg?watermark/2/text/5YyX5bSO5Zu96ZmF6LS45piT77yI5YyX5Lqs77yJ5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/300/fill/I0E3QTlBOA==/gravity/SouthEast