方大型电控换向阀 DQK-2342，DQK-2442， 无锡油研流体科技有限公司

p1Src=//y1.yzimgs.com/uploads/383705/2023423-19932611.png?watermark/2/text/5peg6ZSh5rK556CU5rWB5L2T56eR5oqA5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/650/fill/I0E3QTlBOA==/gravity/SouthEast