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How many hours of training does it take to review the operation certificate of Beijing High Voltage Electrician?
The network access license is 3 days, and the operation license is generally 2 days. But you need to wait in line for the call in advance.

High-voltage electrician's network access operation certificate, also known as electrician's network access operation certificate, is a license issued by the State Electricity Regulatory Commission to engage in electrical installation, testing, maintenance and operation on users' power receiving devices or transmission devices.