crossed helical gear pair

例句：

1. 1.The cross-shaped gears are usedin the transmission system.
   交叉形状的齿轮用于传动系统。
2. 2. The crossed helical gearpair is crucial for the smooth operation ofthe machine.
   交叉螺旋齿轮对对于机器的平稳运行至关重要。
3. 3. The engineer designed a newcrossed helical gear pair to improveefficiency.
   工程师设计了一种新的交叉螺旋齿轮对，以提高效率。