求翻译：长城钻探工程公司ZJ50DB28钻机主机在承包商厂内进行的制造、安装和调试过程的质量控制、信息和合同管理、协调沟通等，以及协助用户对设备的出厂验收和发货。是什么意思？

Great Wall Drilling Company rig zj50db28 host plant by the contractor for the manufacture, installation and commissioning process, quality control, information, and contract management, coordination and communication, as well as to assist users of the equipment of the factory acceptance and delivery

great wall Drilling Engineering Company DB ZJ 50 28 drilling rigs host the contractor in the factory for the manufacture, installation and debugging process of quality control, information and contracts management, coordination and communication equipment, and so on, as well as to assist users of fa

Great Wall drilling engineering firm ZJ50DB28 drilling machine main engine the manufacture, the installment and the debugging process quality control, the information and the contract management, the coordinated communication which carries on in the contractor factory and so on, as well as the assis

Hosts works of the great wall drilling company ZJ50DB28 drilling rig contractor in-plant quality control of manufacture, installation and commissioning of process, such as contract management, coordination, information and communication, factory acceptance and shipment of the equipment and to help t