![]() Rigid gas-insulated transmission lines for rated voltage of 72.5kV and above 额定电压72.5 kV 及以上刚性气体绝缘输电线路 |
![]() Mechanical tests for metal alloys adornment chains—Tensile testing 金属及其合金饰品链力学性能测试 拉力测试 |
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