1.As for static frictional resistance , the optimal combination of archwire , brackets and time was : 3M MBT bracket, 0.018 inch stainless steel round wire and at the 30th day under artificial saliva condition and at 370C ;
2.「The alloy boasts good shaping property, high corrosion resistance, weldability and fatigue strength,medium static strength, is used to make airplane oil tank, oil pipe, oil pipe, metal sheet and instrument for vehicle and vessel,street lamp post and riveted wire.
