当架空线路与爆炸性气体环境邻近时，其间距不得小于杆塔高度的（）倍。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27210' and id < 2260555 and id<>'2260555' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27210' and id > 2260555 and id<>'2260555' order by id asc limit 5