诺冠阀岛电气寿命，norgren VS26型阀岛材质图片

p1Src=//y2.yzimgs.com/uploads/461511/2017729-114954142.jpg?watermark/2/text/5LiK5rW35Lm-5ouT6LS45piT5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/700/fill/I0E3QTlBOA==/gravity/SouthEast"

aa