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1. According the laevorotatory helicoid structure characteristic of the stainless steel spiral plate, analyzed the forming process, and introduced forming die structure.

2. The ortho cone helicoid was used interrsect intercept by the ortho cone helicoid and the cylinder.

3. Two approaches of generating offset surface of helicoid is proposed: directly from helicoid, and from the offset section curve.

4. Adopt the helicoid transporting charging platform, and reduce the labor intensity.

5. In rough cut of NC milling of helicoid, there are many defects when the generic programming means, for example, longer cutting time, inefficient , exigent tools are used.

6. The forming method for variable-pitch helicoid is presented and the general expressions for the helicoid are derived.

7. The shape of the tooth is an involute helicoid .

8. As it is impossible to machine the helicoid gear surface with large module and a few teeth by gear generating,[sentencedict.com] a four-axis milling was developed in this paper.

9. Next, taking helicoid shell as an example, the behaviour matrix of it is deduced.

10. The surface obtained when every point on the edge generates an involute is called an involute helicoid .

11. A circular ring sector with appropriate radii and central angle may be taken as approximate developing pattern of a coil of an undevelopable right helicoid.

12. Tieguanyin is oolong acura, its quality features are: the tea bar curly, fat round knot, heavy even, colour and lustre arenaceous green, whole like dragonfly head, helicoid, frogs legs.

13. Inchoate skin mucous membrane is damaged (sore of first phase, 2 period mildew) can check cadaverous helicoid.

14. Congenital syphilis says the embryo passes syphilis again, it is syphilis helicoid to infect fetal syphilis via placenta.

15. In this paper, the equation of the projection of hob helicoid has also been deduced and the projection is compared with the basic rack nomal profile.

16. To simplified the designing, diagram presentation, construction and profile of helicoidal stair, the formation of helicoid is analyzed, and it′s mathematical model is studied.

17. The surface obtained when every point on the edge generates an involute is called helicoid.

18. Syphilis is a kind of place after because syphilis is cadaverous, helicoid is affected those who happen is venereal.

19. Inchoate congenital syphilis, can blow a discovery through the skin or harm of mucous membrane caustic syphilis is cadaverous helicoid.

20. Pathogenic microorganism including Ruan Duti, virus, Rickettsia, bacterium, fungus and helicoid and so on. human body parasite including protozoan and Shao insect.

21. The second day that is after you walk, the incompetent physicians of the drum building area hospital give you of cause of death:Hook seasonal disease -hang up to carry a helicoid disease.

22. This article introduces a means of NC program about rough cut of helicoid base on helix-milling. The means can improve efficiency of cutting, reduce the cutting abrasion, depress the operating costs.

23. AIM : To use three dimensional printing ( 3 DP ) technology to prepare zero - order controlled - release tablets of helicoid.