| 摘要 |
A portable unit for active grain ventilation comprises solid ventilation parts, in particular a main part and a perforated ventilatory one, of a tubular air-duct, connected between each other by a coupler, and a fan unit with a control panel, mounted on a platform. The ventilatory part of the air-duct is provided with the screw surface, rigidly connected therewith, and the platform and coupler are provided with handles, which are together with the screw surface form a hand drill crank brace. |
