.轮机英语（轮机长大管轮）Lesson 35 Some Steering Gear Rules and Design Considerations.ppt

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.轮机英语（轮机长大管轮）Lesson 35 Some Steering Gear Rules and Design Considerations.ppt

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Lesson35SomeSteeringGearRulesandDesignConsiderationsNewWordsandExpressionsrudderstock舵柱actuator[?kt??e?t?]n.制动器，传动装置duplicate[?dju:pl?ke?t]adj. 复制的,副的,两重的navigable[?n?v?g?bl]adj.适于航行的onerous[???n?r?s]adj. 繁重的,费力的render[?rend?(r)]vt.呈递,致使,实施helm[helm]n.舵summarize[?s?m?ra?z]v.概述,摘要而言NewWordsandExpressionsfed[fed] adj. 反馈的abaft[??bɑ:ft]adv.向船尾chord[k?:d]n.翼弦,和音helmsman[?helmzm?n]n. 舵手maneuver[m?nu:v?]v.机动bendingstress弯曲应力shearstress 剪切应力bush[b??]n.(机械)轴瓦衬套NewWordsandExpressionsoverhung[???v?h??]adj.从上悬垂的vicinity[v??s?n?ti]n.邻近,附近,接近1.RULESThevitalimportanceofsteeringgearstothesafetyofshipsneednotbeemphasizedbutisclearlythereasonforthewidedegreeofcontrolwhichisexercisedovertheirdesignandperformance.SomeofthemoreimportantRulerequirementsaregivenbelow,butforfullerinformationonthissubjectreferenceshouldbemadetotherelevantGovernmentRegulationsandtotheRulesoftheClassificationSocieties.TheRuleswhichfollowarenottakensolelyfromthoseofanyAuthoritybutarerecordedhereasbeingofmostinteresttothereader,whoshouldbeawarethatsomevariationsdoexistintheRulesofthedifferentauthorities.AccounthasalsobeentakenofsomeproposedamendmentstotheconventionofSafetyofLifeatSea(SOLAS)Regulationswhicharelikelytotakeeffectinthenearfuture.ThoseconcernedwithmeetingtherequirementsofanyparticularAuthorityarecautionedthereforetoreferdirectlytotheRulesoftheAuthorityconcerned.1.1.MainandAuxiliarySteeringGearAllshipsmustbeprovidedwithanefficientmainandauxiliarysteeringgearandexceptforverysmallvesselsthemainsteeringgearmustbepoweroperated.TheauxiliarysteeringgearmustalsobepoweroperatedwhentheRulediameteroftherudderstockexceeds230mmforpassengervesselsand250mmforcargovessels,althoughthel