NP-DA系列是双柱塞泵，采用紧凑型 NP-D-321A 图片

p1Src=//y1.yzimgs.com/uploads/556607/202493-183821256.png?watermark/2/text/5rGg55Sw5bGL5a6e5Lia77yI5rex5Zyz77yJ5pyJ6ZmQ5YWs5Y-4/font/5a6L5L2T/fontsize/300/fill/I0E3QTlBOA==/gravity/SouthEast"

aa