比例换向调速阀 EDFG-01-30-3C2-XY-50T EFBG-06-250-20T145 EFBG-06-250A-C-20T233 EFBG-06-250A-20T233 EFBG-06-250-C-20T145 EFBG-06-250A-H-20T145 EFBG-06-250-H-20T233 EFBG-06-250-H-20T145 EFBG-06-250A-C-20T145 EFBG-10-500-H-20T233 EFBG-10-500-C-20T145 EFBG-10-500A-H-20T233 EFBG-10-500A-20T233 EFBG-10-500-20T145 EFBG-10-500A-C-20T233