... Co., Ltd. Make full ranges of spare parts for semi-trailers: A. Mechanical suspension: Casting or welded ... Single side operation or twin side operation landing gears for semi-trailers. Can be same design as JOST, ... 22.5, 8.25-22.5 N. Brake Chamber for semi-trailer, full series. T20, T24, T30 single ... brake chamber. T24/30, T30/30 double brake chamber. O. Twist lock, lifting type ...