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在双级主减速器中，锥齿轮啮合间隙的调整原则是、小出从、顶进主以及。

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摩擦离合器主动部分包括、和，从动部分包括和，压紧机构由若干根沿圆周均匀布置的压紧弹簧，它们装在压盘与离合器盖之间，用来将压盘和从动盘压向飞轮，使飞轮、和三者压紧在一起。

汽车不能行使，最常见的故障是打滑。

在机械转向系中，转向梯形是指和。

Match the words underlined with their definitions.A. (n.) important parts or aspects of somethingB. (adv.) by means of electronic equipment such as a computerC. (v.) to be different in different situationsD. (adj.) being the only one of a kind, unlike anything elseE. (v.) to make someone believe something that is not trueF. (n.) two or more different things used togetherG. (adj.) complete or totalH. (adj.) as much as is needed___ 1. The man's face was recorded electronically and then used to confirm his identity._ 2. The student got a passport because his student card wasn't sufficient forinternational travel._ 3. Each person's fingerprints are unique._ 4. The woman's hair color and eye color, along with other physical features, made iteasy to identify her._ 5.To identify the man, the police used a combination of information from a photoand a hair sample._ 6.Driver's licenses vary from country to country._ 7.He pretendedthat everything was fine.___ 8.The woman couldn't say with absolute certainty that she recognized the man inthe photo.