压差控制器防爆 D520M/7DD切换差可调 818180，818580，818280，818680，818480，818880， 无锡市昌林自动化科技有限公司

p1Src=//y1.yzimgs.com/uploads/398001/202439-153728961.jpg?watermark/2/text/5peg6ZSh5biC5piM5p6X6Ieq5Yqo5YyW56eR5oqA5pyJ6ZmQ5YWs5Y-4IA==/font/5a6L5L2T/fontsize/700/fill/I0E3QTlBOA==/gravity/Center