A.Cut the painter line so it will not pull the liferaft container down
B.Swim away from the container so you will not be in danger as it goes down
C.Take no action because the painter will cause the liferaft to inflate and open the container
D.Manually open the container and inflate the liferaft with the hand pump
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