钢结构焊接中，可以引弧的构件是( )。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24587' and id < 2110310 and id<>'2110310' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24587' and id > 2110310 and id<>'2110310' order by id asc limit 5