美标圆锥管螺纹塞规（NPT）wi129549 北京若水合科技有限公司

p1Src=//y1.yzimgs.com/uploads/333955/20171013-163710682.jpg?watermark/2/text/5Lic6KW_5Luq77yI5YyX5Lqs77yJ56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/400/fill/I0E3QTlBOA==/gravity/SouthEast