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IP rating (Ingress Protection) is an important standard for evaluating the dust and water resistance of equipment. This standard is developed by the International Electrotechnical Commission (IEC) to provide a unified protection level assessment for electrical equipment. The first number in the IP code indicates the ability to protect against the entry of solid foreign objects, such as fingers or dust, and ranges from 0 to 6; The second number indicates protection against liquid intrusion and ranges from 0 to 9.