The shuttle takes about 1.5 hours to go around and the speed, that tangentialspeed, is very close to eight kilometers per second.
飞机需要一个半小时,且其切向速度，非常接近8千米每秒。
2
The design is improved by using a continuous double tangential tapered gating system and a bigger size runner. The gate area is increased and the gating speed is slightly reduced.
优化设计中采用连续的锥形双切向浇注系统和较大的浇口尺寸，使浇注面积增加，浇注速度略微降低。
3
The paper begins with the comparison of properties of hi speedtangential belts and introduction of the infrastructures thereof.