【導讀】evaluationofscientificdevelopment.Naturesecuritytype--naturesecurityistomaintenancepeopleofhealthvaluefortarget,throughstrengtheningsecuritybasedmanagement,andriskmanagement,andequipmentmanagementandtechnologysupervision,ensureproductioninthepeople,andreal,andsystem,andsystem,elementsecurityreliable,andharmonyunified,fulcontrolvariousagainstfactors,achievedthoughtnoslack,andmanagementnoemptydocume