PPS: Perhaps what I need is not a house at all, but a traveltrailer.
PPS：也许我需要的不是一间房屋，而是旅行拖车。
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A motor vehicle with space and equipment either in a rear compartment or in an attached trailer for sleeping and simple housekeeping used for camping and recreational travel.
With CAN-bus technology, problem to control cooperated operation of its hydraulic steering system can be settled and intelligent control for the trailertravel is realized.