I think that it is good by the seam welding, the electric, and the gas. シーム溶接、電気でもガスでもいいと思います。
Please to the junction of the steel frame.
鉄骨の接合部などにどうぞ。
I think that it is good by the seam welding, the electric, and the gas. シーム溶接、電気でもガスでもいいと思います。