This dissertation focuses on the solid modeling of the Worm-Type Parts, such as the worm, worm wheel, indexing CAM, and so on, which has spacial surface.

本文以蜗杆、蜗轮及分度凸轮等具有空间曲面轮廓的蜗杆类零件为研究对象，探讨了该类零件的实体建模问题。

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The machine uses the worm-type supporting base with good rigidity and high precision.

本机台采用蜗杆式支撑座，钢性好，精度高。

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Based on meshing theory, a formula is derived for calculating index error of worm-type CAM follower (i. e. Tindex plate) under influence of actual worm-type CAM profile and dimensions.

以啮合理论为基础，导出了蜗式凸轮机构从动件(即分度转盘)在凸轮实际轮廓和实际机构尺寸诸因素的影响下，分度误差的计算公式。

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But when it comes to versatility, nothing beats the fried wax worm (a type of caterpillar), which can be used in salty, spicy, and sweet dishes.

BBC: Edible insects crawl onto menus

Deep in oceans around the world lurks a type of worm without a mouth, anus or gut that makes its living by eating the bones of whales and other deceased sea creatures.

MSN: Zombie worm has no mouth �� but it feasts on whale bones

In the lake, however, there is the risk of bilharzia, an infection by a type of parasitic worm, so travellers who choose to swim or dive there often stock up on the treatment, Praziquantel tablets.

BBC: The planet��s pristine waters