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See Chinese contents: GB/T 12971.2-2008 GB/T 12971.2-2008: Trolley and contact wires for electric traction -- Part 2: Aluminium and steel composite trolley and contact wires
This Part of GB/T 12971 specifies the product models, specifications, materials, test, package and marking, transportation and storage, etc. of aluminum and steel composite trolley and contact wires. This Part is applicable to the aluminum and steel composite trolley and contact wires used for electric transport, lifting system in the railways, mining, urban traffic, etc.
