With high speed welding,less investment and savings wire,a particular low price,the advantages of simple operation 1.The HFH automatic submerged arc welding suture line for the past few years,I develop a new product to the yard of the 19 completed a welding.2.Using submerged arc welding,first in the coutry with a high speed welding(2.5m/mm),non-polluting,non-luminous,surface smooth,the direct ...