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变压器瓦斯继电器的安装,要求导管沿油枕方向与水平面具有( )升高坡度

单选题
2021-09-01 20:45
A、0.5%~1.5%
B、2%~4%
C、4.5%~6%
D、6.5%~7%
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正确答案
B

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