求助翻译~~~

Our clients demanded jetting before examination,because the pipelines are too long,the jetting water was not able to reach the destined places,usually we can only wash 50 to 60 metres.This is the limitation of the cleaning method,we've taken a lot of measures,but finally we still was not able to jet the ends.Now we refer this problem with these final cases.
Because of the incompleteness of cleaning, there's still some silt deposited in the pipes,which makes the wheels shifting and the machinery can not move.

Detection of cleaning before making the request of the customer. Because the pipeline is too long, rinsing water can not arrive at a predetermined location, usually cleaning 50 meters to 60 meters, This is the cleaning of the limitations, we have adopted many ways, and ultimately not to clean up, The data are submitted as final.

Cleaning is not complete because the pipelines of a small amount of silt deposition, wheel skid, the machinery from mov