1997资源列表
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[国外标准] AWS A5.23-A5.23M-1997 Specification for Low Alloy Steel Electrodes and Fluxes for Submerged Arc Weld
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[国外标准] AWS A4.2M A4.2-1997 Standard Procedures for Calibrating Magnetic Instruments to Measure the Delta Fe
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[国外标准] BS EN 917-1997 Plastics piping systems Thermoplastics valves Test methods for resistance to internal
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[国外标准] BS EN 907-1997 Agricultural and forestry machinery Sprayers and liquid fertilizer distributors Safet
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[国外标准] BS EN 899-1997 Chemicals used for treatment of water intended for human consumption Sulfuric acid
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[国外标准] BS EN 894-2-1997 Safety of machinery-Ergonomics requirements for the design of displays and control