What is the difference between commercial and household electric pressure cookers?

Please verify the following points and require itemized written supplier responses:（commercial electric pressure cooker pressure-cooker-comparison） Commercial models have larger capacity, heavier-duty construction and safety devices for repeated use. Household models are not designed for long, high-frequency commercial cooking. Check rated power, capacity, duty performance, spare parts and commercial product documentation. Define capacity, accuracy, materials and operating environment before requesting quotes on a uniform basis. Request specification sheets, test reports, certificates, maintenance manuals and spare-part lists. During acceptance, verify appearance, dimensions, functions, safety protection and packaging, and keep test records. Do not compare unit price alone; include customization, freight, spare parts, after-sales support and downtime risk. Keep written records of inquiries, confirmations, FAT, acceptance and warranty commitments.