gun v.— «The present invention relates to a process for the repair of blast furnaces. More specifically, it relates to a method of repairing blast furnaces using a vertical remote controlled refractory gunning apparatus.…U.S. Pat. No. 4,649,858...
gun v.— «The present invention relates to a process for the repair of blast furnaces. More specifically, it relates to a method of repairing blast furnaces using a vertical remote controlled refractory gunning apparatus.…U.S. Pat. No. 4,649,858...
