A.熱鍍鋅 B.銅 C.不銹鋼 D.冷鍍鋅
A.相序保護 B.自動投切 C.定期切換 D.低壓保護
A.檢查葉片與托板的鉚接應(yīng)牢固 B.葉片角度應(yīng)一致,動墊圈鎖緊 C.撥動葉輪轉(zhuǎn)動靈活后,通入380V交流電源,運行1min以上 D.試運轉(zhuǎn)風機轉(zhuǎn)動平穩(wěn),轉(zhuǎn)向正確,無異聲