自攻螺纹衬套 有一种螺纹保护紧固... 启先实业（上海）有限公司

p1Src=//y1.yzimgs.com/uploads/441524/2016323-223815507.jpg&p2Src=//y2.yzimgs.com/uploads/441524/2016323-223845463.jpg&p3Src=//y3.yzimgs.com/uploads/441524/2016323-223913192.jpg"

aa