这种类型的雪花，叫做扇形盘，当温度下降到华氏5度(——15摄氏度)使成形。
This type of snowflake, called a sectored plate, forms when the temperate dips below about 5 degrees Fahrenheit (-15 degrees Celsius).
执行详细目视检查确保钢索没有接触到除了滑轮，扇形盘，钢索封严或者安装在钢索运行行程上的索环的其他部件。
Perform a detailed visual inspection to make sure that the cable does not contact parts other that pulleys, quadrants, cable seals, or grommets installed to control cable routing.
转向系统包括转向盘、转向轴、蜗杆、扇形齿轮、转向摇臂、直拉杆、转向节臂、主销、转向臂、转向直拉杆、前轴和转向节。
It consists of steering wheel steering shaft worm gear sector pitman arm drag link steering knuckle arm king pin steering arms tie rod front axle and steering knuckle.
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