齿轮 、带齿滚柱或指销，用以和蜗杆啮合。
The gear sector, toothed roller, or stud meshes with the worm.
前轮摆振是指汽车在平坦的路面上直线行驶时，转向轮以一定的幅度和频率绕主销持续振动的现象。
Front wheel shimmy is the phenomenon that steering wheels vibrate around king-pin axis with a certain amplitude and frequency when the vehicle travels in a straight road.
市盈率估值法和市销率估值法是国外成熟的证券市场上常用的股票投资价值的评估方法，但他们作为单一指标具有一定的局限性。
In a mature stock market of foreign countries, the price-earnings ratio approach and price-sales ratio approach are used to assess the value of stocks in common.
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