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GB 12971.2-1991 Contact wire for electric traction Part 2: Copper contact wire
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This standard specifies product models, specifications, materials, technical requirements and inspection rules for copper contact
1970-01-01 category：National Standard (GB)+ View
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GB 12971.5-1991 Contact wire for electric traction Part 5: Aluminum alloy contact wire
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This standard specifies the product varieties, specifications, technical requirements and inspection rules for aluminum alloy cont
1970-01-01 category：National Standard (GB)+ View
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GB 12971.4-1991 Contact wires for electric traction Part 4: Steel, aluminum and aluminum alloy composite contact wires
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This standard specifies the product varieties, specifications, technical requirements and inspection rules for steel, aluminum and
1970-01-01 category：National Standard (GB)+ View
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GB 12971.3-1991 Contact wire for electric traction Part 3: Steel and aluminum composite contact wire
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This standard specifies the product varieties, specifications, technical requirements and inspection rules of steel and aluminum c
1970-01-01 category：National Standard (GB)+ View
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GB 12971.1-1991 Contact wire for electric traction
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This standard specifies the product classification, inspection rules and packaging markings of contact wires for electric traction
1970-01-01 category：National Standard (GB)+ View
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GB 1094.5-1985 Power transformers Part 5 Short circuit capability
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GB 1094.5-1985 Power transformers Part 5 Capacity to withstand short circuits GB1094.5-1985 standard download decompression passwo
2024-09-20 category：National Standard (GB)+ View
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GB 1094.3-1985 Power transformer Part 3 Insulation level and insulation test
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GB 1094.3-1985 Power Transformer Part 3 Insulation Level and Insulation Test GB1094.3-1985 Standard download and decompression pas
1970-01-01 category：National Standard (GB)+ View
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GB 7228-1987 Method for measuring the rectification efficiency of electrolytic rectifier equipment and the power utilization rate of its power supply objects
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This standard is applicable to the testing of the efficiency of high-power rectifier equipment used to produce non-ferrous metals
1970-01-01 category：National Standard (GB)+ View
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