三段压缩 Tricomp
三段式液压升降装置 three stage jack
三阶段减压贮藏 three-stage hypobaric storage
三阶段变压器、电炉 Three-phase transformer, electric stove
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保护功能有三段过电流保护、反时限过流保护、三相一次检无压自动重合闸等。
The protection functions include three-section over-current protection, inverse-time over-current protection, three-phase one-shot no-voltage auto-recloser and so on.
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