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用处：重点用来保送酒精、自然气的管线。
Useful: The focus used to send alcohol, natural gas pipeline.
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管线钢主要用于石油和天然气的输送。
The pipeline steel is mainly used in transmission pipe of oil and natural gas.
youdao
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管线钢主要用于石油和天然气的输送。
The pipeline steel is mainly used in transmission pipe of oil and natural gas.
youdao