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What are the welding methods of Rushan Shipyard? Electrical? Two guarantees? Argon arc? Which is more popular?

I'm from Yantai Shipyard. The hull is positioned by manual arc welding, and the cover plate is filled with two protections. The pipeline is made of argon arc, and the cover is filled with two guarantees. In fact, you earn a lot of money because of your strong skills. Electric welding is a harmful job. In fact, the most profitable pipeline is 4 130, and a weld is 4000 yuan.