double spring drop compass 双簧小圈圆规
double spring hinge 双弹簧铰链 ; 双弹簧绞链
double spring 双弹簧
single double spring door [建] 单扇双开弹簧门
Double Spring Bottom Oil Can 复簧底油壶
double spring model 双弹簧模型
double spring support 双弹性支撑
double spring element 双弹簧单元
Improvement of injector: double-spring injector, pump nozzleElectronic-controlling spraying system: adopting electronic-controlling spraying pump to implement position control on assigning-type oil-spraying system; adopting electronic-controlling spraying system to implement position control on straight-row oil-spraying pump.
2、改进喷油器:双弹簧喷油器、泵喷嘴。 3、电子控制喷射系统:将分配式喷油泵上实施位置控制的电控喷油系统、直列式喷油泵上实施位置控制的电控喷油系统。
参考来源 - 关于降低柴油机有害排放的研究与探讨·2,447,543篇论文数据，部分数据来源于NoteExpress
Buildings in Shanghai continue to spring up without loft insulation or double glazing.
在上海，没有顶楼隔热或双层玻璃的建筑不断涌现。
If I make the spring twice as long, I would get double the extension, because when I have two springs in series, each one, under the influence of this force, will get longer by this amount.
若弹簧长度加倍，拉长刚才的两倍，当我把两个弹簧串联，任何一个弹簧，在这个力的作用下，将会拉长相同的量。
Structurally, DNA is composed of two strands that intertwine to form a spring-like structure called the double helix.
从结构上讲，DNA是由两条链相互缠绕构成弹簧状结构称为双螺旋。
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