A.20S16-4RMA、 B.20S16-4RME C.20S16-4TQO D.20S16-4TQC
A.2.40MPa B.2.45MPa C.1.45MPa D.0.45MPa
A.并聯(lián)關(guān)系 B.串聯(lián)關(guān)系 C.橋接關(guān)系