certificate of observation 说是清关用的是个什么东西?类似于检测单 质保书之类的吗?

certificate of certificate of certificate of CERTIFICATE OF ORIGIN 是什么 CERTIFICATE OF ORIGIN ISSUED “certificate of conformity”是什么意思? reach certificate of compliance certificate of registration是什么意思 certificate of completion “certificate of conformity”是什么意思? CERTIFICATE OF INCORPORATION, certificate of attendance是什么意思 certificate of completion是什么意思 certificate of completion certificate of conformity是什么意思 certificate of enrollment是什么意思 certificate of goodstanding是什么意思 certificate of guarantee是什么意思