backing bead meaning in English

背垫熔接联珠
封底焊道
焊根

Ceramic welding backups are used for one - sided welding of steel and aluminum alloy with any thickness , instead of two sided welding in shipbuilding industry , marine industry , and heavy mechanical industry . the products are stuitable for the most kinds of welding process such as gmaw , saw , fcaw and seg even with high electric current to produce a satisfactory back bead formation
陶瓷焊接垫是用作钢铁或铝合金单面焊双面成型的支撑件，可替代效率低下的双面焊工艺，被广泛应用于造船，桥梁和重型机械等工业领域的各种焊接（ gmaw , saw , fcaw和seg ）甚至高电流场合