straight-edge cone

例句：

1. 1.The straight-edge cone is a useful tool for measuring angles.
   直边圆锥体是测量角度的一个有用的工具。
2. 2.In the construction of buildings, the straight-edge cone is often used to ensure stability.
   在建筑施工中，直边圆锥体经常被用来确保稳定性。
3. 3.The engineer carefully measured the length of the straight-edge cone before installing it.
   工程师仔细测量了直边圆锥体的长，然后才安装它。