弹簧活塞式减压阀
上海风雷阀门集团有限公司
p1Src=//y2.yzimgs.com/uploads/3124/201675-101951288.jpg?watermark/2/text/5LiK5rW36aOO6Zu36ZiA6Zeo6ZuG5Zui5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/750/fill/I0E3QTlBOA==/gravity/Center