单色比色计
monochromatic colorimeter
单面涂层双层纸板
one-side coated duplex board
灰色双层漂移型线性规划
grey bi-level drift-type linear programming
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
双色比
dichroic ratio
dual band ratio
radiation ratio of dual bands