... joints are spun-riveted
with special nylon washers in between
for extra smooth actionBe suitalbe
for UPVC windows and ventilators ... friction stays are tested to rigorous salt-pray test
for protection against corrosive atmospheres.Fine workmanship .Easy to ... to national technical standard QB/T3888-1999
for Alloy Stainless Steel Window HingeOur advantage: Excellent service Punctual shipment.Good ...