A rack-and-pinion gear set is enclosed in a metal tube, with each end of the rack protruding from the tube. 整個(gè)齒輪齒條式轉向器裝載金屬殼內，其齒條從轉向器伸出來(lái)與轉向搖臂連接。
A toothed rack was commonly adopted for the automatic screw thread rotational unloading. 自動(dòng)旋轉脫螺紋一般采用齒輪齒條機構或液壓齒輪機構。
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