dual certificate system
dual-certificate education
acceptance certificate
验收合格证
验收准则
接受证书
验收单
验收证书
验收证瞄
验收证明书
Acceptance Certificate on Engineering Completion
acceptance of certificate
agents collecting by certificate
air carrier operating certificate
aircraft radio station certificate
airline transport pilot certificate
airman medical certificate
airman official certificate
airman rating certificate
airworthiness certificate