三相变压器同侧绕组的连接形式主要有（        ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68475' and id < 4421178 and id<>'4421178' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68475' and id > 4421178 and id<>'4421178' order by id asc limit 5