Experience with adaptive integration over a triangulated region using the Levin transformation (abstract and references only)
An engine driven blower/dust collector in which the suction opening and the discharge opening are arranged in the same plane in a side-by-side relation, and an air-switching slide pipe is provided to slide on the plane of these openings so as to permit the blower/dust collector to operate selectively as desired as a blower for blowing off and drifting together dust or the like and as a vacuum dust collector for collecting the dust or the like.