2 steel frame should be formed by cold bending; Grille steel frame should be welded with fetal membrane. And control the ruler with 1: 1 details.

Inches.

3 There shall be no false welding in steel frame processing and welding, and there shall be no defects such as cracks and flash on the weld surface.

4 After each steel frame is processed, it should be put on the cement floor for trial assembly, and the allowable error of peripheral assembly is 3 cm, which is smooth.

The allowable deviation of surface warping should be 2cm.

The welding method is generally help welding.

Covered electrode's words are generally 40 covered electrode.