A.1000mm~1100mm B.1500mm~1600mm C.1800mm~1900mm D.2000mm~2100mm
A.后澆帶連接 B.套筒灌漿連接 C.螺栓連接 D.預(yù)埋鐵件連接
A.10 B.15 C.20 D.25