pk10开奖记录历史记录Even before you buy, feel free to download our welding procedures. If you are already a customer be sure to read the welding procedure so that you use the grouser bar to its full potential. 4N Grouser Bars are fit to weld in the shop and in the field. If weld incorrectly the grouser bars will lose their hardness. For the best weld be sure to purchase 4N Welding Wire.