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  • 简介:Rareearthpermanentmagneticmaterialsarewidelyusedindifferentfieldstoday.Praseodymiumisanexcellentelementtoimprovemagneticpropertyalthoughitdoesn'thavedistinguishedperformanceasapermanentmagneticmaterial.Whenaddedadequatepraseodymium,nomatterinwhichgenerationmaterials,suchasthefirstgenerationrareearthmagneticmaterial-SmCoalloyorthethirdgenerationmaterial-NdFeB,performanceofpermanentmagneticmaterialscouldbeeffectivelyimproved.Withthewideapplicatio...

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  • 简介:Inthefirsthalfof2005,therewasatrendofstructuralreforminBaotourareearthindustry.Industrychainswereextendedfromprimaryleveltohigh-level.MaineconomyindexesofBaotourareearthindustryandyieldsofmajorrareearthproductsinthefirsthalf-yearwereshowninTable2andTable3respectively.Table2MainEconomyIndexesofBaotouREIndustryCategoryAccumulatedvalueoftotaloutputofindustryValueaddedSalesincomePayingtaxesForeigncurrencyearningMainIndexRMB1.51...

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  • 简介:TofullyunderstandthelevelsandchangingtrendsofhealthattainmentofChina’surbanandruralresidents,comprehendhealth-relatedpoliciesandeffectsofhealtheducationprogrammesandprovidescientificbasisforgovernmentsandhealthandfamilyplanningadministrativedepartmentsatvariouslevelstoformulatehealth

  • 标签: 中国人 健康 计划生育 农村居民 教育活动 行政部门