建设单段长度为300m的管道，宜釆用的管材是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28908' and id < 2354714 and id<>'2354714' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28908' and id > 2354714 and id<>'2354714' order by id asc limit 5