helical rack

• 螺旋齿条

helical rack的用法和样例：

例句

1. The fuel rack requires little force to accomplish its motion.
   油泵齿条几乎毋须费力就能使之移动。
2. The rack type pusher designed by Chongqing Steel is in good condition.
   所设计的齿条式推钢机使用状况良好。