Northman北部精机,低噪音型电磁控制溢流阀DSRF-G03-1PN-1-A110-10-30,DSRF-G03-1PN-1-A240-10-30,DSRF-G03-1PN-2-D24-10-30,DSRF-G03-1PN-3-A120-20-30,DSRF-G06-1PN-3-R220-10-30,DSRF-G06-1PN-4-R120-20-30,DSRF-G10-1PN-3-D24-10-30,DSRF-G10-1NP-5-D12-20-30