购买时要注意检查工艺质量，应特别注意检查有无焊接缺陷，诸如开焊、未焊、漏焊等现象。看门扇与门框的配合是否密实，间隙是否均匀一致，开启是否灵活，所有接头是否密实。
When purchasing, pay attention to the inspection of process quality, especially the inspection of welding defects, such as open welding, no welding, missing welding and so on. Check whether the fit of door leaf and door frame is dense, whether the gap is uniform, whether the opening is flexible, and whether all joints are dense.
门板的表面应进行防腐处理，一般应为喷漆和喷塑，漆层表面应无气泡，色泽均匀，大多数门在门框上还嵌有橡胶密封条假山制作 不锈钢铸件 铝箔真空袋 七孔梅花管 hdpe硅芯管 液压钢坝 PVC软管 飞行激光打标机 沥青保温泵，关闭门时不会发出刺耳的金属碰撞声等。
The surface of the door panel shall be treated with anti-corrosion treatment. Generally, it shall be painted and sprayed with plastic. The surface of the paint layer shall be free of bubbles and uniform in color. Most doors are also embedded with rubber sealing strips on the door frame. When the door is closed, there will be no harsh metal collision