SIEMENS takes air insulation as its product feature and has long been promoting switch cabinets without any insulation. Early circuit breakers are products with open insulation support. Air has always been the safest, reliable, environmentally friendly, and stable insulation gas. As a global switchgear manufacturer, we have products sold all over the world, the simpler the more reliable. Due to the different requirements for product applicable standards, voltage and other parameters, usage habits, and other requirements around the world, differentiated designs are required to meet the needs of local customers. A single product will cause difficulties in application and will not match customer requirements. It is difficult to accept. In some areas, standard products cannot meet the requirements. Especially when the product grades are used in large and small products, and the product standards are used in high and low products, the cost is obviously too high, and customers are unwilling to pay for high parameters and high standards. For example, Southeast Asia and other countries like floor-mounted handcarts, but the mid-mounted type is not suitable, while the Middle East and other countries need a meter room with a height of one meter and two, and standard products need to be modified.