A.高、中壓調(diào)節(jié)閥的升程校驗 B.自動主汽門的開關(guān)校驗 C.軸向位移的推力試驗 D.防喘振調(diào)節(jié)閥的啟閉校驗
A.311V B.220V C.110V D.180V
A.2 B.3 C.4 D.5