GB/T 12971.2-2023 Trolley and contact wires for electric traction—Part 2:Aluminium and steel composite contact wires

GB/T 12971.1-2023 Trolley and contact wires for electric traction—Part 1:Copper and copper-alloy contact wires

GB/T 12971.2-2008 Trolley and contact wires for electric traction Part 2:Aluminium and steel composite trolley and contact wires

GB/T 3190-2020 Chemical composition of wrought aluminium and aluminium alloys GB/T 9056-2004 Metal ruler GB/T 12971.1-2023 Trolley and contact wires for electric traction—Part 1:Copper and copper-alloy contact wires GB/T 26497-2011 Electronic balance GB/T 3048.2-1994 Test methods for determining electrical properties of electric cables and wires Measurement of resistivity of metallic conductive materials GB/T 3048.2-2007 Test methods for electrical properties of electric cables and wires—Part 2:Test of electrical resistivity of metallic materials GB/T 4067-1999 Testing method for electrical resistance-temperature characteristic parameters of metallic materials GB/T 4909.2-1985 Test methods for bare wires—Measurement of dimensions GB/T 4909.2-2009 Test methods for bare wires—Part 2:Measurement of dimensions GB/T 4909.3-1985 Test methods for bare wires—Tensile test GB/T 4909.3-2009 Test methods for bare wires—Part 3:Tensile test GB/T 4909.4-1985 Test methods for bare wires—Torsion test GB/T 4909.4-2009 Test methods for bare wires—Part 4:Torsion test JB/T 8137.2-1995 JB/T 8137.2-1995 wire and cable delivery disk technical requirements JB/T 8137.2-2013 Wiring Cable Delivery Tray - Part 2: Full Wooden Construction Delivery Tray (English) JB/T 8137.4-2013 Electric Cable and Wire Delivery Tray - Part 4: Steel Composite Structure Delivery Tray JB/T 8137.2-1999 Wiring Cable Delivery Tray - Part 2: Full Wooden Construction Delivery Tray JB/T 8137.4-1999 Wiring Harness Delivery Vessel - Part 4: Steel and Composite Structure Delivery Vessels