1.1 this manual describes the object, shape structure, technical requirements, quality requirements, inspection rules, packaging, specifications and requirements for use of the intelligent electronic lock of the letter box.1.2 product adoptionGb5944 evaluation of corrosion test results of metal coating of light industrial products;GB / t10125-1977 corrosion test in artificial atmosphere salt spray test;GB / t1804-92 undeclared tolerance of general linear dimensions;