联合型液控单向阀 DFY-F50H1，DFY-B20H2， 无锡油研流体科技有限公司

p1Src=//y2.yzimgs.com/uploads/383705/202356-65523463.png?watermark/2/text/5peg6ZSh5rK556CU5rWB5L2T56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/650/fill/I0E3QTlBOA==/gravity/SouthEast