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炭弧气刨炭棒 物理及使用性能试验方法
Test method for physical-operational performance of air-arc gouging carbon electrodes
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电影放映炭棒
Cinema carbons
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炭石墨.产品分类及型号编制方法
Classification and type arrangement method of carbon-graphite products
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炭弧气刨炭棒 物理及使用性能试验方法
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青铜石墨含油轴承
Oily bronze graphite bearing
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倒顺开关
Two direction switch
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隔离开关熔断器组
Switch disconnector fuse
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DZ20系列塑料外壳式断路器
DZ20 Series moulded-case circuit-breakers
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高压开关设备和控制设备标准的共用技术要求
Common specifications for high-voltage switchgear and controlgear standards
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