First the math theory of machining simulation is studied, and the set structure of NC machining simulation system whose components, including time, input, output and so on, are defined. Hereby we set up the hierarchy structure, the logical structure, the static model and the dynamic model of simulation system. The construction method of sweep entity of cutter and rotation parts is researched, and their differential geometry invariants are calculated. NC code is unscrambled, and the recursion division arithmetic of time segment is put forward, which is the driven data of the movement or rotation parts. The CLDATA should be interference-free. To examine if there is interference between cutter flank and the work piece, an arithmetic that discussed the existence of intersecting curve between them is put forward. To examine if there is interference between two turrets, an arithmetic that discussed the existence of intersection set between two polygons is put forward.

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This book will set forward your grades.

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The enterprise will be set forward by more efficient management .

更有效的經(jīng)營管理將促進該企業(yè)的發(fā)展。

Of which, twenty and four thousand were to set forward the work of the house of the LORD

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He set forward his proposition in no uncertain terms.

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He set forward his proposition in uncertain terms .

他含含糊糊地提出了他自己的建議。

Moreover, a new modification technique based on the fuzzy optimization knowledge is set forward.

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And the children of Israel set forward, and pitched in Oboth.

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The proposal he set forward is practicable .

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The enterprise of mining for silver was set forward by the increase of capital.

這個開采銀礦的企業(yè)增加資本，擴大生產(chǎn)被爆操精品网站。