單項(xiàng)選擇題
站場(chǎng)ESD系統(tǒng)分為哪幾級(jí)()
A.ESD-1,站場(chǎng)泄壓關(guān)斷;ESD-2,站場(chǎng)保壓關(guān)斷;ESD-3站場(chǎng)區(qū)域關(guān)斷
B.ESD-1,站場(chǎng)保護(hù)關(guān)斷;ESD-2,站場(chǎng)泄壓關(guān)斷;ESD-3站場(chǎng)區(qū)域關(guān)斷
C.ESD-1,站場(chǎng)區(qū)域關(guān)斷;ESD-2,站場(chǎng)保壓關(guān)斷;ESD-3站場(chǎng)泄壓關(guān)斷