What are the welding principles for steel doors and windows? Whether the vertical or vertical vertical welding, corner and doors and windows are used in what way to welding. More
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The steel frame with the doors and windows of the project that is to take dry construction, steel frame only from the middle of the connection, the steel frame with its own welding requirements are not high; but the steel frame to form a frame, horizontal or vertical length can be. Want to learn more about the doors and windows of the wall knowledge, please Google input: "Union curtain wall Forum"
