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[国外标准] NFPA 121-2001 Standard on Fire Protection for Self-Propelled and Mobile Surface Mining Equipment
353.2 KB2020-12-03
[国外标准] MSS SP-121-2006 Qualification Testing Methods for Stem Packing for Rising Stem Steel Valves
99.21 KB2020-12-02
1.38 MB2020-12-02
[国外标准] BS EN 60684-3-121 to 124-2001 Flexible insulating sleeving — Part 3 Specifications for individual ty
244.39 KB2020-12-02
[国外标准] BS 812-121:1989 Testing aggregates. Method for determination of soundness
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7.48 MB2020-11-10
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6.65 MB2020-11-02