Southeast Asialaser theodolite DJD2-JELThe good faith for thisMeasuringinstrumentisinordertoachievethetargetcertainattributevaluesandmeasureneededthreestandards,measuringinstrumentisgenerallyhasthescale,capacityetc. Scholarsandvoyagerisveryclear,ifwecanaccuratelymeasuretheobject'spositiononthesea,sothesailorscancertainlyknowtheirlatitude.Todothis,needisaprecisionmeasuringinstruments.

Prism,akindofbybothtwointersecteachotherunparallelplaneoftransparentobjects,tolightordispersioninthebeam. Prismisthetransparentmaterial,suchasglass,crystal,etc.)madeofsolid.Itiswidelyusedinopticalinstruments.Prismaccordingtoitsnatureandpurposecanbedividedintoseveralkinds. Inthespectruminstrument,forexample,thecompositelightisdecomposedintospectraldispersionprism,iscommonlyusedisequilateralprism;Atperiscope,binocularsandotherinstrumentsinthechangeindirectionofthelight,

soastoadjustitsimagingpositioncalled"totalreflectionprisms",generallyadoptsrectangularprism. Thesideoftheprism,thelightincidentemergentflatside. Prismmainsection:aplaneperpendiculartothesideiscalledthemainsection.Accordingtotheshapeofthemainsectioncanbedividedintoprism,rectangularprism,pentagonalprism,etc.

Tapemeasure LeathertapeismadefromglassfiberandPVCplasticalso,aliasfibertapeorflexiblerule.Generallyisthemetricsystem,onesideis150cm,anothersideto60inches. Measuringunitinchesiscommonlyusedinforeigncountries,thetelevisionandthesizeofthedisplayunitisinch.Andjeanssizeisinches.Athome,ameasuringtapemeasurecommonlyusedisininches.A150cm,45,anotherside.Oftensay2'1,2'2waist,istheunitininches.

Theodoliteisusedasthemeasurementlevelandstraighttheodoliteview,firstusedasatrianglemeasurement.Itistheimportantmeasureandtheengineeringwork, especiallythelocalmeasurementisdifficulttoarrive.Butsometimestouseonclimateandtherocketlaunch.Theodolitehasatelescope,someofthemachinery, canmakethetelescopepointinginthedirectionisnotthesame.Theodolitehastwostraightaxisofeachother,inordertoset-upatelescopeazimuthAngleandlevel.Suchstandlayoutisshort,capitalislow,

suchaslongjumpabovetheinstrumentfurtherafield. Restrictedtelescope,togetherwiththeverticalplatearoundthehorizontalaxisintheshift,thecollimationaxisoftelescopeshallbethehorizontalaxisorthogonal, horizontalaxisshouldbethroughthedescriptionofwaterdish.Sightingofanumberline(sightingaxis)intoinstrumentswithinthebaseofthecollar,sightingdepartmentmaymakelevelchange.

ifusedtoinvestigateobject,becausedayweekdirectionofcelestialbodiesgenerallyparalleltothehorizonstraightornot,andthereforedemandchangetogethertwoaxisandalongwiththetimechangespeedtalentsearchobject, buttheviewintheotherdaytoappreciaterelativetotherotatingcelestialbodies,unlesswithoffsetfieldrotationgroup,orshouldnotbeusedforthelongtimeexposureofgeography.