Abstract: The invention relates to a folding bed, belonging to the field of furniture, comprising a mattress, a pillow and a bed frame. Seven X-shaped support frames are adopted to constitute a main structure of the bed frame, and an upper edge of the X-shaped support frame is provided with foldable support rods and connecting pieces. The whole structure may be folded longitudinally and transversely to form a columnar body after folding, which can sufficiently reduce the gap between the support rods, so as to minimize the volume, and it is convenient to carry and store after use. The pillow is filled with memory cotton to fit the human body and is comfortable for sleeping.

Abstract: An efficient electrochemical pre-scaling water treatment device is disclosed. The device comprises an enclosed box, wherein anode positioning connecting shafts, anode plates, cathode plates and scrapers are distributed in a length direction of the closed box, the scrapers are fixed to a scraper holder, the anode plates are fixed to the anode positioning connecting shafts, and the cathode plates are fixed to a central shaft; the anode positioning connecting shafts, the scraper holder and the central shaft are fixed on the enclosed box; in the width direction of the enclosed box, a water inlet is provided at a first side of the enclosed box, a water outlet and a sewage outlet are provided at a second side of the enclosed box, and exhaust holes are provided at a top of the enclosed box.

Abstract: Disclosed herein are corrosion-resistant composites. In particular, the composites can include a piezoelectric material embedded within a binding medium that can impede or inhibit the corrosive effects caused by salts and acids. Also disclosed herein are methods of making the composites and methods of protecting a concrete or concrete-related substrate from corrosion.

Abstract: Disclosed herein are corrosion-resistant composites. In particular, the composites can include a piezoelectric material embedded within a binding medium that can impede or inhibit the corrosive effects caused by salts and acids. Also disclosed herein are methods of making the composites and methods of protecting a concrete or concrete-related substrate from corrosion.