牛津英语整理模块七课文及翻译

地形平坦开阔，地层由第四系全新冲积层，第四系上更新统冲层组成，局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25～50m，岩性主要为黏土、粉质黏土、粉土、粉砂、细砂；第四系上更新统冲积层厚度大于50m，岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为：粉土、黏土、粉质黏土，局部表层为杂填土。couplingCentreshallbechecked,thesecondpouredconcretestrengthofmorethan70%.Intheprocessofreamingorboring,apartfromthespecialprovisionsinfactory,doesnotallowanyworkthatmayaffectthecouplingCentre,suchasirrigation,tocylinderconnectionstofloodthecondenserpipesandsoon.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Mountingboltsshouldbeaddedlubricants,typinggentlywithasmallhammer,nottoolooseortootight,packedtheboltswiththecorrespondingsealscrewholeshouldbemarked.6.4.5.4.2couplingreamedandpairingsisclosetothediameterofboltbearinggoodhingeholes,dressedwithagoodtwocouplingboltsbeforeyoucanmovetherotor,boring-reamingholeinturn.Couplingboltsmustbetightcouplingissymmetricaldiameter,inboring,reaming,twoboltsout.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Duetothecouplingboltsinaccordancewithhingeholescorrespondingtothediameterofthescrewholesonebyoneafterprocessing,processingbackboltinstallationlocationcannotbechanged,soaccordingtoboltaftertheactualweightdifferenceofnutandlockwashertomatch.Generalrequirementsforcouplingtwosymmetricaldiameterbolt,nutandlockwasher'stotalweightdifferenceshouldnotbegreaterthan10gandknocksstampedmark.(SeeFigure18)Thecouplingboltsapplylubricant,andthengentlywithcopperhome,nottoolooseortootight.BoltAssemblyisfinished,symmetricaltighteningallboltsto30%,50%,70%,100%force,andcheckthecouplingflutterandbeforeconnectingthecirclegraduallychangesitsvalueshouldbelessthan0.02mm.Tighteningtorqueofthecouplingboltsshallcomplywiththetechnicalrequirementsmanufacturersdrawings,withadynamometricwrenchorlogtensiontools.Threewheelrotorswingtestcouplingconnectionsshouldbechecked:takingleave,Unit1TVandaudiodevices:areviewEarlyhistoryofTVThefirstpublicshowingsofwirelessTVtransmissionsweremadein1925intheUSAandin1926inBritain.Later,in1928,thefirstlong-distanceTVbroadcastwasmadebetweentheUKandtheUSA.Regularpublicbroadcastingfollowedshortlyafter,firstbeginningon11May1928inNewYorkandinLondonon20August1929.ManydifferentpeoplecontributedtothedevelopmentofTV.Becauseofthis,itisstilluncertainwhoinventedTV.Altogether,threemencouldberesponsible.VladimirZworykin,aRussianlivingintheUSA,PhiloFarnsworth,afarmboyfromUtahintheUSA,andJohnLogieBairdfromScotlandallinventedearlyformsofTVbetween1923and1927.Afewyearslater,colorTVwasfirstshownin1929.Ittookmorethantwodecades,though,until1951,forcolourbroadcaststobeginintheUSA.By1967,mostbroadcastswereincolorandwithinfiveyears,morecolourthanblack-and-whiteTVsetswerebeingused.Themodernage:cableTV,satelliteTV,digitalTV,...CableTVbeganin1948intheUSA,butittook50yearsbefore66percentofAmericanhouseholdshadit.SatelliteswereusedtobroadcastTVbeginningin1962.SomeconsiderdigitalTVtobesuperiortosatelliteTVbecauseitallowsthesameservicestobedeliveredwithclearerpicturesthanbefore.InternationalstandardsfordigitalTVwereestablishedin1989andwithinfiveyears,consumersintheUSAhadaccessto200channels.By2004,digitalTVsignalswerebeingreceivedby55percentofhouseholdsinBritain.In1996,acompletelynewconceptwasintroducedwhenthefirstWebTVset-topboxescameontothemarket.ThiscombinestheTVsetwiththeWorldWideWeb.WithinteractiveTVprogramming,youcanplayalongwithgameshows,respondtoquestionnairesandchattootherviewers.EarlyhistoryofaudiodevicesItallbeganin1877whenThomasEdisonmadethefirstrecordingofahumanvoice.Tenyearslater,thefirstrecordplayerwasdeveloped.ItwasinventedbyEmileBerliner,aGermanlivingintheUSA.Atthattime,therecordplayerhadtobewoundupbyhandandonlyplayedarecordfortwominutes.In1958,thefirstLPs(long-playrecords)cameontothemarket.Taperecordersandplayers1931wastheyearwhenaGermancompanybegantomakethefirsttaperecorders,whichcouldrecordandplaysoundsonatapewoundaroundaroundobject.In1948,threeAmericanscientistsinventedthetransistor,whichisasmallelectronicdevicetocontrolanelectriccurrent,buttheyonlydevelopeditformilitaryuse.TwoyoungJapaneseengineershadabetteridea.Theyboughtthepatentandappliedthetechnologytocreatethetransistorradio.In1954,theinventionofthetransistorledto地形平坦开阔，地层由第四系全新冲积层，第四系上更新统冲层组成，局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25～50m，岩性主要为黏土、粉质黏土、粉土、粉砂、细砂；第四系上更新统冲积层厚度大于50m，岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为：粉土、黏土、粉质黏土，局部表层为杂填土。couplingCentreshallbechecked,thesecondpouredconcretestrengthofmorethan70%.Intheprocessofreamingorboring,apartfromthespecialprovisionsinfactory,doesnotallowanyworkthatmayaffectthecouplingCentre,suchasirrigation,tocylinderconnectionstofloodthecondenserpipesandsoon.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Mountingboltsshouldbeaddedlubricants,typinggentlywithasmallhammer,nottoolooseortootight,packedtheboltswiththecorrespondingsealscrewholeshouldbemarked.6.4.5.4.2couplingreamedandpairingsisclosetothediameterofboltbearinggoodhingeholes,dressedwithagoodtwocouplingboltsbeforeyoucanmovetherotor,boring-reamingholeinturn.Couplingboltsmustbetightcouplingissymmetricaldiameter,inboring,reaming,twoboltsout.Wellboring,hing