A.貨運(yùn)業(yè)務(wù) B.現(xiàn)場(chǎng)作業(yè) C.技術(shù)業(yè)務(wù) D.安全技術(shù)
A.1 B.2 C.30 D.50
A.50mm B.100mm C.120mm D.150mm