The present invention is directed to an industrial high-speed door assembly having a reduced door panel width and having guides for guiding the door which extend into a passageway but are resilient, tough, or resiliently collapsible, to either withstand impacts from vehicle collisions or moveable during opening of the door to avoid collisions while returning for guidance upon closing the door. In response to this permission signal, U-phase lower-arm driver circuit drives U-phase lower-arm MOSFET. The biogas to be dried first flows through the silica gel layer. The spool member may be rotatably biased to retract the leash element within the housing.