double leaf swing bridge 双翼平旋桥
double leaf 双折叶
double-leaf bascule bridge 双叶竖旋桥
double leaf door 双截门
double-leaf gate 扉闸门 ; 双扉闸门
Double-leaf fern Pictures 双扇蕨图片
double leaf gate 双翼大门
Double-leaf forceps 双叶产钳
Double leaf forceps 双叶小产钳
The original seal structure and the improved seal structure of the double-leaf swing door at the outside end are described.
介绍了外端双扇摆门的原密封结构和改进后的密封结构，对比分析了硅橡胶条、尼龙毛刷和羊毛毛刷的密封性能。
Behind its blank facades sits a double-height wall covered in gold leaf, oriented to reflect the south light that streams in through a high window.
在其空白的立面后是覆盖着金箔的双层高的墙壁，以反射从高窗进入的南向光。
Primary observation to T2-generation showed that double mutant plant had obvious dwarf phenotype, but had no defect in leaf trichome and vasculature.
对T 2代双突变体植株表型初步观察显示，植株有明显矮化现象，但维管束和叶毛的发育基本正常。
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