上下两组缸载荷均方差的翻译：Up and down two sets of cylinders loads mean-square deviation 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Two standard deviation upper and lower cylinder load

Up and down two sets of cylinders loads mean-square deviation

About two group of cylinder load mean-square deviation

Both parties are poor payload tank group

Up and down two sets of cylinders loads mean-square deviation