A.100mm B.120mm C.130mm D.150mm
A.200mm B.300mm C.400mm D.500mm
A.300kg B.310kg C.320kg D.330kg
A.70mm B.80mm C.90mm D.100mm
A.一 B.二 C.三 D.四
A.履带式起重机 B.汽车式起重机 C.轨道式塔式起重机 D.附着式塔式起重机
A.65% B.75% C.85% D.95%
A.3h B.4h C.5h D.6h
A.20mm B.30mm C.40mm D.50mm
