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    1. In the light of the inefficiency of the conventional 2 - D engagement design method for tricone bits and the untruth of the 2 - D engagement chart, a new Program for bit engagement design is develope.
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    2. Since the gear engagement is a common coupling form between rotors, the transfer matrix of skew gear engagement in global coordinate system is deduced based on the concept of coupling element.
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    3. On the basis of the engagement principle of spatial curved surface, the engagement features of the toroidal drive are systematically studied.
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    4. Since the gear engagement is a common coupling form between rotors, the transfer matrix of skew gear engagement in global coordinate system is deduced based on the concept of coupling element.
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    5. product:pp film non-woven bags, non-woven bags, pp film non-woven fabrics, non-woven fabric, apron, product all kinds of non-woven bags.
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    affiance betrothal contract engagement handfast precontract
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    Decisive Engagement
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    empathic engagement
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    endwise engagement
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    engagement
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