用气体保护塞焊，焊接封闭板与内侧灯罩之间的接合处。
Plug-weld the connection between the closing panel and the inner light housing under shielding gas.
连接层可用冲压成型的钢质菱形网，用气体保护焊接方法点焊于钢板上。
Layer can be used to connect steel stamping forming diamond-shaped network, with gas shielded welding spot on the plate.
用气体保护全对接焊，焊接外侧梁。
Weld the outer side member with a full butt weld under shielding gas.
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