A.不大于8m、不大于8m B.不大于6m、不大于7m C.不大于8m、不大于7m D.不大于7m、不大于6m
A.不大于8m、不大于7m B.不大于6m、不大于7m C.不大于7m、不大于7m D.不大于7m、不大于6m
A.不小于500mm B.不小于50mm C.不大于500mm D.不大于50mm