A two-horse team street cleaner , with sprayer , squeegee , and roller at rear .
两匹马组成的街道清扫车辆，车后部备有喷头、橡胶扫帚和滚压机。
The projects he has been involved with include a refrigerator built from clay , which uses no electricity yet can help keep vegetables fresh for several days , and a cheap crop-duster in the form of a sprayer mounted on a motorcycle .
