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1、NFPA®270StandardTestMethodforMeasurementofSmokeObscurationUsingaConicalRadiantSourceinaSingleClosedChamber2013EditionNFPA,1BatterymarchPark,Quincy,MA02169-7471AnInternationalCodesandStandardsOrganizationIMPORTANTNOTICESANDDISCLAIMERSCONCERNINGNFPA®DOCUMENTSNOTICEANDDISCLAIMEROFLIABILI
2、TYCONCERNINGTHEUSEOFNFPADOCUMENTSNFPA®codes,standards,recommendedpractices,andguides(“NFPADocuments”),ofwhichthedocumentcontainedhereinisone,aredevelopedthroughaconsensusstandardsdevelopmentprocessapprovedbytheAmericanNationalStandardsInstitute.Thisprocessbringstogethervolunteersrepre
3、sentingvariedviewpointsandintereststoachieveconsensusonfireandothersafetyissues.WhiletheNFPAadministerstheprocessandestablishesrulestopromotefairnessinthedevelopmentofconsensus,itdoesnotindependentlytest,evaluate,orverifytheaccuracyofanyinformationorthesoundnessofanyjudgmentscontained
4、inNFPADocuments.TheNFPAdisclaimsliabilityforanypersonalinjury,propertyorotherdamagesofanynaturewhatsoever,whetherspecial,indirect,consequentialorcompensatory,directlyorindirectlyresultingfromthepublication,useof,orrelianceonNFPADocuments.TheNFPAalsomakesnoguarantyorwarrantyastotheaccu
5、racyorcompletenessofanyinformationpublishedherein.InissuingandmakingNFPADocumentsavailable,theNFPAisnotundertakingtorenderprofessionalorotherservicesfororonbehalfofanypersonorentity.NoristheNFPAundertakingtoperformanydutyowedbyanypersonorentitytosomeoneelse.Anyoneusingthisdocumentshou
6、ldrelyonhisorherownindependentjudgmentor,asappropriate,seektheadviceofacompetentprofessionalindeterminingtheexerciseofreasonablecareinanygivencircumstances.TheNFPAhasnopower,nordoesitundertake,topoliceorenforcecompliancewiththecontentsofNFPADocuments.NordoestheNFPAlist,certify,test,or
7、inspectproducts,designs,orinstallationsforcompliancewiththisdocument.AnycertificationorotherstatementofcompliancewiththerequirementsofthisdocumentshallnotbeattributabletotheNFPAandissolelytheresponsibilityofthecertifierormakerofthestatement.REMINDER:UPDATINGOFNFPADOCUMENTSUsersofNFPAc
8、odes,
