using 23.5-25 E3 piercing resistant formula on wash ore soil site

In Mongolian gold mine, using 23.5-25 E3 piercing resistant formula on wash ore soil  site. it is used for 2 more months than other brands, and the pattern wear is less. 

In Mongolian gold mine, using 23.5-25 E3 piercing resistant formula on wash ore soil  site. it is used for 2 more months than other brands, and the pattern wear is less.