No conductive dust and corrosive gas which may destroy metal and insulation;

没有导电尘埃与能破坏金属及绝缘的腐蚀性气体的场所；

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In addition, the insulation of the whole oil and gas pipe is strengthened.

另外，加强了整根油气管的保温。

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In addition, the insulation of the whole oil and gas pipe is strengthened.

另外，加强了整根油气管的保温。

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