What is the K value for Windows？

What is a regular aluminum alloy profile?

What is the service life of the adhesive?

What is the warranty period for doors and windows? What situations are not covered by the warranty for work?

How is the packaging used to ensure the quality of doors and windows during transportation?

What are the key processes in the processing of flat aluminum alloy doors and windows?

What are the main hardware accessories for sliding windows?

What are the comparative advantages of Casement window, sliding window and inward sliding window?

What is a hinged door or window? What is a hanging window? What is an inward opening and inward reversing window? What is a fixed window?

What is the Heat transfer coefficient of ordinary aluminum alloy doors and windows?