Custom sliding and folding door window: 1.Watertightness and air-tightness 2.Fireproof, 3.Impact resistance 4.Best ... hotels, apartments or villas. Company IntroductionMore than 100 skilled workers and over 10 senior engineers Main market: Europe market, American ... service 3)Strict quality Control System, including in-process inspection and final inspection. 4). Best OEM service, high quality, fast ...