网体填料安装时，最下一层丝网波纹方向应垂直于支承栅板，其余各层波纹方向与塔轴线成（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24910' and id < 2125180 and id<>'2125180' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24910' and id > 2125180 and id<>'2125180' order by id asc limit 5