(A)15min (B)30min (C)50min (D)1min
(A)機械部分有雜物 (B)斷電 (C)電氣接觸不良 (D)數(shù)據(jù)接口接觸不良
(A)雙臺面 (B)單臺面 (C)移動 (D)固定