【案例】 1994年7月，某特种灯具有限责任公司依法登记成立，按照公司章程及登记核准的经营范围是：生产、销售特种灯具，广告、装潢装饰灯，舞台艺术灯。同年8月，灯具公司得知某物资公司有一批三合板待销，同时又得知某保丽板厂急需三合板。灯具公司于8月20日与物资公司签订? 【Case】 July 1994, a special lighting limited liability company registered according to law established in accordance with the articles of association and registration of the approved business scope is: production and sale of special lamps, advertising, decorative lighting, stage art lights. In the same year in August, the lighting company learned that a material company has a number of plywood for sale, and at the same time learned that a ply plant is in urgent need of plywood. Lighting company on August 20 signed with the supplies company?