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- double helical tooth 人字齿
- 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。
- 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 artical presents the principle and equipment for slotting large modulus gear with helical teeth and herringbone gear with narrow slot cutter groove. 介绍了在大型普通滚齿机上插削大模数斜齿轮和小空刀槽人字齿轮的原理与装置。
- Abstract: This artical presents the principle and equipment for slotting large modulus gear with helical teeth and herringbone gear with narrow slot cutter groove. 文摘:介绍了在大型普通滚齿机上插削大模数斜齿轮和小空刀槽人字齿轮的原理与装置。
- Study of Grinding Helical Tooth Blade by Numerical Control 螺旋齿刀具的数控刃磨系统的研究及开发
- double helical gear milling machine 人字齿轮铣齿机
- Engineering ceramics and reinforced nylon are combined in sleeve of centralizer.The outer surface of sleeve has four helical teeth which can decline wear rate significantly. 工程陶瓷、增强尼龙同体组合扶正套，外表面四条螺旋齿形成扶正面，油管磨损率低。
- 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
- carbide taper shank endmill with helical teeth 硬质合金斜齿锥柄立铣刀
- He is working double tides to finish his essay. 他日夜苦干，赶写他的文章。
- 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。
- The carpet is too thick to double up. 这地毯太厚没法折叠。
