短语
救生梯
[安全]
Emergency escape ladder
形态发生梯度
[胚]
morphogenetic gradient
室外逃生梯
Emergency Escape
自生梯度复合材料
in-situ graded composite
;
in-situ FGMs
;
in suit gradient composites
产生梯度组
Make Gradient Group
胡佛大坝紧急逃生梯
Hoover Dam Emergency Stairs
电梯发生故障
Lift out of order
阶梯波发生器
[电子]
staircase generator