| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB 12971.4-1991 | English | 319 |
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Days<=3
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Trolley and contact wires for electric traction. Part 4: Aluminium-steel and aluminium alloy composite trolley wires
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GB 12971.4-1991
| Obsolete |
GB 12971.4-1991
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