delivery certificate meaning in English

交船证书
交货证书

Sichuan provincial salt administration has been sending salt administrative personnel to salt making enterprises in the province to verify the edible salt delivery certificate and industrial salt delivery certificate and to guarantee that salt products delivery is based on the certificate
省盐务局组织盐政人员全面进驻全省制盐企业，实施放运盐产品的食盐准运证和工业盐放运证明的验证，进行运盐监装、放运盐产品凭证放运出厂的监督管理。