求翻译：企业设计人员根据顾客需求对联合收割机的操作灵活（C1）、有导航系统（C2）、有车速调节系统（C3）、操作室人性化设计（C4）、脱粒效率高（C5）、价格合理（C6）、外型美观（C7）7个方面进行了问卷调查。是什么意思？

Enterprises according to customer demand for designer combines flexible operation (C1), a navigation system (C2), a speed control system (C3), operating room friendly design (C4), threshing efficiency (C5), reasonable prices (C6), good looks (C7) 7 conducted a survey of aspects.

According to the customer demand for enterprise design personnel operating flexible (C combines a Navigation System ( 1 ), 2 ), there is a speed regulating C (C 3) system, operating room humanized design (C 4) C, threshing, and high efficiency ( 5 ), reasonable price (C C ( 6 ) and pleasing in a 7 7

The enterprise designed the personnel nimbly according to the customer demand to the combine operation (C1), has the guidance system (C2), has the vehicle speed governing system (C3), the handling room user friendly designs (C4), the seed extraction efficiency high (C5), the price reasonable (C6), a

Business officer according to customer demand for flexible operation of combine harvesters (C1), navigation system (C2), speed adjustment system (C3), operating room humanized design (C4), threshing efficiency (C5), and reasonable price (C6), appearance (C7) 7 aspects of a questionnaire.

Enterprise's designer is flexible according to the operation of the combined harvester of customer's demand (C1), there are navigation systems (C2), there is speed that regulates the system (C3), operating room humanization last (C4), thresh with high efficiency (C5), price reasonable (C6), aestheti