... backrest & thighrest adjustment, whole bed HI-LO control2,High quality carbon-steel applied for the main body of the bedstead,all ... antirust treatment,antibacterial powder coating.3,One-off forming of carbon-steel bed plate,great strength ,large air-bleed hole design ... Aluminum alloy foldable guard rails,easy and reliable operation.6,Full-enclosed motor with strong thrust,low noise,waterproof and ...