双层双跨混凝土框架
double-story and double-span RC frame
平顶直墙
large-span duct with horizontal roof and straight
单面涂层双层纸板
one-side coated duplex board
混凝土小型空心砌块双层墙体系
concrete small hollow block wall system of double
生铀层双层结构
Uranium-bearing double—layer structure
双层平凹版法
bimetal deep-etch process
双层平板测量模型
Dual-layers measurement model
双层平流沉淀池
Two-story horizontal sedimentation tank
双层平面电感
double-layer planar inductor