求翻译：现场调研：从2012年1月开始至今，项目组根据前期的工作进展情况，结合甩挂运输试点工作的推进情况，对5个省份的8个企业进行了现场调研，分别是是什么意思？

Site research: Beginning in January 2012 so far, the project team based on the early progress of the work, combined with the propulsion pull transport pilot work, conducted a field investigation of eight companies in five provinces, namely,

On-site research: From January 2012 since the beginning, the project team based on the earlier work in progress, and shake to combine transport pilot work in advance, and on May 5 OF THE 8 provinces of the enterprise on-site research, and they are

正在翻译，请等待...

Field research: since the start of January 2012, the project group according to the progress of work in the early, combination of rejection hanging transport pilot work forward, 5 8 Enterprise conducted an on-site investigation of the provinces, namely

Scene investigation and study: Starts from January, 2012 until now, the project group basis earlier period work progress situation, the union flings hangs transports the experiment site work the advancement situation, has carried on the scene investigation and study to 5 province 8 enterprises, resp