国外标准列表
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[国外标准] BS EN 4130-2009 Aerospace series — Bolts, normal hexagonal head, coarse tolerance normal shank, medi
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[国外标准] BS EN 409-2009 Timber structures — Test methods Determination of the yield moment of dowel type fast
[国外标准] BS EN 4130-2009 Aerospace series — Bolts, normal hexagonal head, coarse tolerance normal shank, medi
[国外标准] BS EN 409-2009 Timber structures — Test methods Determination of the yield moment of dowel type fast