双层固定化
Double-layer immobilization
bilayer-immobilization
单面涂层双层纸板
one-side coated duplex board
固定双上肢悬挂
hanging with upper limbs bound
生铀层双层结构
Uranium-bearing double—layer structure
双层双跨混凝土框架
double-story and double-span RC frame
双层双曲抛物面网格壳
hyperbolic parabolic double-deck reticulated shall
双层双扇形
double-layer twin fans shaping
固定层间对比法
fixed-interval correlation
固定层煤气发生炉
fixed bed coal gas generator