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Grade I wood quality requirements

Grade I wood quality requirements

Answer:

Shanghai Juye wood preservative wood quality standards: 1, not allowed to decay; 2, not allowed to die, missing section, live less than or equal to 15mm;
5, bend the curvature of not more than 1%, horizontal bend is not allowed; 6, tolerance: -2mm <width <+2 mm ??????????? -1mm <thickness <+ 1mm ??????????? -5mm <length <+ 5mm
3, the end of the flat, surrounded by a saw, planing; 4, not allowed to break;

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