国外标准列表
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[国外标准] BS EN 1680-1997 Plastics piping systems Valves for polyethylene (PE) piping systems Test method for
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[国外标准] BS EN 1668-1997 Welding consumables Rods, wires and deposits for tungsten inert gas welding of non a
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[国外标准] BS EN 1667-1998 Prevailing torque type all-metal hexagon nuts with flange with metric fine pitch thr
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[国外标准] BS EN 1666-1998 Prevailing torque type hexagon nuts with flange (with non-metallic insert) with metr