简介:Rareearthpermanentmagneticmaterialsarewidelyusedindifferentfieldstoday.Praseodymiumisanexcellentelementtoimprovemagneticpropertyalthoughitdoesn'thavedistinguishedperformanceasapermanentmagneticmaterial.Whenaddedadequatepraseodymium,nomatterinwhichgenerationmaterials,suchasthefirstgenerationrareearthmagneticmaterial-SmCoalloyorthethirdgenerationmaterial-NdFeB,performanceofpermanentmagneticmaterialscouldbeeffectivelyimproved.Withthewideapplicatio...
简介:Inthefirsthalfof2005,therewasatrendofstructuralreforminBaotourareearthindustry.Industrychainswereextendedfromprimaryleveltohigh-level.MaineconomyindexesofBaotourareearthindustryandyieldsofmajorrareearthproductsinthefirsthalf-yearwereshowninTable2andTable3respectively.Table2MainEconomyIndexesofBaotouREIndustryCategoryAccumulatedvalueoftotaloutputofindustryValueaddedSalesincomePayingtaxesForeigncurrencyearningMainIndexRMB1.51...
简介:TofullyunderstandthelevelsandchangingtrendsofhealthattainmentofChina’surbanandruralresidents,comprehendhealth-relatedpoliciesandeffectsofhealtheducationprogrammesandprovidescientificbasisforgovernmentsandhealthandfamilyplanningadministrativedepartmentsatvariouslevelstoformulatehealth