duplex gear hobber

例句：

1. 1. The newduplex gear hobber has significantlyimproved the efficiency of our machinery.
   这款新型的双联齿轮装置大大提高了我们机械的效率。
2. 2. The engineers were able to designa duplex gear hobber thatcould handle heavy loads without breaking down.
   工程师们设计出了一款能够承受重负载而不会损坏的双联齿轮装置。
3. 3. Theduplex gear hobber was usedin the construction of the bridge, whichgreatly reduced the time and cost of theproject.
   这种双联齿轮装置被用于桥梁的建设中，大大减少了工程的时间和成本。