Acceptance of metal engineering (1) Whether the metal body structure is straight or flat; if the window part, it is required that the sealing member such as a strip of glue be completed. (2) Whether the metal form is flexible and has no obstacles. (3) Whether the pipe joints of anti-theft nets, security doors, etc. have been polished, have a stable placement, and have not loosened. (4) Whether the specifications and wall thickness meet the requirements. (5) There is no leakage of rain between the window and the window. Security doors and windows Melamine MDF,Melamine Sheets For Cabinets,White MDF Panel,MDF Melamine Board LINYI JIUHENG IMPORT AND EXPORT CO.,LTD , https://www.jiuhengwood.com