LNG vehicle cylinders are mainly used in two types of natural gas buses and natural gas heavy trucks. The low temperature insulated cylinders sold on the market today are called Dewars. Strictly speaking, the vehicle LNG cylinders also belong to Dewar. It’s just different. Dewar is a general term for containers such as low temperature insulated cylinders. To be strictly distinguished, Dewar is mostly studied in the laboratory, while the insulated cylinders are of mass production type. Currently, according to the volume, the market commonly uses 175L 195L 210L 450L 499L several Dewar specifications. LNG car bottles are mainly 450L 500L 750L 850L 995L large volume. The structure of LNG vehicle gas cylinder is basically the same as that of Dewar. The main filling medium of LNG vehicle cylinder is LNG, while the Dewar bottle is divided into medium pressure and high pressure. The high pressure Dewar can be filled with liquid oxygen, liquid nitrogen, LNG and argon. A variety of media such as gas.