Check at every level: from production to testing one-stop service material selection→sales→maintenance→manufacturing→transportation→maintenance→export→installation→service→testing→debugging→after-sales ATTENTION: 1. You must know before buying the product: If you don't understand, consult before buying: 2. Before buying the product, you must determine the needs, configuration, and cabinet requirements: 3. Is the transformer quoted according to the original drawing or the actual customer requirements: 4. For the transportation of special large items, please consult the freight instructions, and consult the customer service in advance for invoice requirements: 5. Customer-exclusive customized products do not support return and exchange services, regular stock is confirmed: