GB/T 1231-1991

Specifications of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures

NORMA vydaná dňa 22.4.1991

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The information about the standard:

Designation standards: GB/T 1231-1991
Note: NEPLATNÁ
Publication date standards: 22.4.1991
Country: Chinese technical standard
Kategória: Technické normy GB