1．this series on rollers window cross section structural design is reasonable, the midheaven glass and ordinary Shan Boshan the material is complete, may install the crescent moon lock luxuriously, the outlook natural, on rollers nimble, the efficiency is good, the environmental protection performance is prominent; 2. this series unique multistep draining water slides to the structural design, the draining water high performance, slides compares with the old-style 70 series on rollers windows, Canada has supposed the wooltop position, strengthened between two chute's leak-proof qualities, causes this series water tightness and gas tightness is better; 3. this series in the old-style 70 series on rollers window's foundation, sealed, on the solid horizontal cross section to widen correspondingly, after increasing Dongkou decorated, the window frame visible width, maximum limit has met the different user's esthetic need。
