A.每5m檢查2點(diǎn) B.每5m檢查1點(diǎn) C.每6m檢查1點(diǎn) D.每6m檢查2點(diǎn)
A.抽查30%,允許偏差5mm B.抽查25%,允許偏差6mm C.抽查25%,允許偏差5mm D.抽查30%,允許偏差6mm
A.不超過塔高的1/3000且不大于30 B.不超過塔高的1/2000且不大于30 C.不超過塔高的1/2000且不大于40 D.不超過塔高的1/3000且不大于40