对于500kV的高压输电线路，避雷线的保护角一般不大于（）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32606' and id < 2592726 and id<>'2592726' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32606' and id > 2592726 and id<>'2592726' order by id asc limit 5