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- Double helical structure of DNA and types of DNA helices. 去氧核糖核酸的双螺旋结构与其类别。
- The kinematic relationship between the wheel and the cutter is analyzed.An algorithm of computing tool path for grinding helical curve cutter with CNC ginder is given. 分析了砂轮与刀具前刀面之间的相对位置关系,给出了数学模型,提出了数控磨削螺旋刃刀具刀位轨迹生成的实用方法。
- We also demonstrated that a DX molecule containing another small double helical region (called a DX + J molecule) is very stiff. 我们也证实,DX分子外加其他双股螺旋小片段所形成的DX+J分子也一样坚固。
- Using 2-aminopyridine as an organic ligand and a structure-directing agent, we have synthesized a new zinc phosphite (C5H6N2)Zn(HPO3) containing double helical chains. 我们以2-氨基吡啶为结构导向剂和配体分子,合成了一种新颖的具有双螺旋链的亚磷酸锌层状化合物(C5H6N2)Zn(HPO3)。
- This paper introduced setting up the parametric expressions, and how to creating the helical curve and unwrapping the curve on the plane based on UG by the parametric unwrap equation of concrete-mixer drum logarithm helical curve. 推导出搅拌运输车搅拌筒对数螺旋线平面展开方程,用UG的参数表达式来实现螺旋线和在平面上展开曲线的生成。
- concrete- Mixer drum helical curve 搅拌罐螺旋线
- Non-equiangular logarithm helical curve 非等变角对数螺旋线
- double helical gear milling machine 人字齿轮铣齿机
- double helical double-reduction unit 两级人字齿轮减速器
- double helical double reduction unit 两级人字齿轮减速器
- double helical ribbon and screw impeller 双螺带-螺杆搅拌桨
- Pilot-scale Study on Swirling Flow by Double Helical Inlets 双进口涡向起旋流场实验研究
- Complicated helical curved surface 复杂螺旋曲面
- He is working double tides to finish his essay. 他日夜苦干,赶写他的文章。
- Parametric Expression Design of Concrete-mixer Drum Helical Curve and its Unwrapping Based on UG 搅拌筒螺旋线平面展开方程及基于UG的参数化表达式
- I do not realize it is a double feature. 我原先不知道这是双片连映。
- Double agents live in a perpetual state of fear. 两面派永远过着提心吊胆的生活。
- I want a double room with a view. 我要一间能看到风景的双人房间。
- He was so fat that he had a double chin. 他胖得有双下巴了。
- Keywords Silk loom, let-off mechanism, ratchet gearing, Free-wheeling clutch, Logarithm helical curve; 丝织机;送经机构;棘轮机构;超越离合器;对数螺旋曲线(面);