ladder type frame

例句：

1. 1.The ladder type frame is a popular choicefor building tall structures.
   梯子型框架是建造高层建筑的热门选择。
2. 2. The laddertype frame was designed to make climbing easierand safer.
   梯子型框架设计用来让攀爬更容易更安全。
3. 3. The ladder type frameis used in construction to support heavy loads.
   梯子型框架在建筑中用于支撑重载。