A.not to affect the draught trim B.not to affect the cargo ventilation C.not to affect the free surface D.not to affect the vessel's stability
A.經(jīng)濟(jì)B.安全C.發(fā)展D.主權(quán)
A.混凝土板下空隙內(nèi)存在自由水B.軸載的反復(fù)作用C.細(xì)集料的供給D.低溫