According to relevant documents, when cold temperature causes high subsidence, the minimum obstacle clearance margin (MOC) is not exceeded___ Is acceptable。
A.A.10% B.B.15% C.C.20%正确答案C
According to relevant documents, when cold temperature causes high subsidence, the minimum obstacle clearance margin (MOC) is not exceeded___ Is acceptable。
A.A.10% B.B.15% C.C.20%正确答案C
