一旦设计并得到批准，就必须建立完整的维修程序,该程序必须以清晰、简明的语言提供给需要的人
A.Upon designed and approved, completed maintenance procedures must be established This procedure must provider clear easy language to people who need it B.Upon design and approval, the establishment of complex maintenance procedures is a must. This procedure must provide a clear, precise language to those who need it C.Once designed and approved, the establishment of thorough maintenance procedures is a must. This procedure must be available in clear, concise language to those who need it正确答案C
