Having the structure analyzed, the ability to cross obstacle of both the parts and the whole is determined, the design principle and using advice of some parts is given.

本文在水平井牵引器机构分析的基础上，给出了部分零件的设计原则和牵引器越障性能的评价。

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By simulation of the tractor in straight oil pipe with obstacle, discussed the working situation of components and the relation between drag force and the force need to cross obstacle.

通过直管障碍的仿真实验，得出了牵引器在直管中越障时各组件的工作状态、直管越障阻力与设计牵引力的比例关系。

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Today, the main obstacle to cross-gender friendships is often jealousy from a romantic partner. To overcome this, communication is essential.

现如今，这种跨越性别的友谊所面临的主要障碍往往是另一半的嫉妒。想要克服这点，沟通交流尤为重要。

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America's tough restrictions on cross-ownership of different media businesses may pose a further obstacle to restructuring.

ECONOMIST: Media firms and private equity

The main obstacle to her participation is that several of her young proteges are competing in the Reebok Cross Challenge - the umbrella event for the trials.

BBC: McColgan set to return