阀型避雷器利用非线性阀片限流，并依靠火花间隙在工频续流第一次过零时熄弧。（ ( )（0.6）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69414' and id < 4494363 and id<>'4494363' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69414' and id > 4494363 and id<>'4494363' order by id asc limit 5