有密室的房间一般地板和墙面不垂直 There's slight angle to the floor in the room 密室用钢筋加固会产生超负荷的重量导致周围地板轻轻下陷 The extra weight of the safe room steel reinforcements can cause the floor around it to decline slightly 导致1至5度的倾斜 creating a slope between one to five degrees.