Pratt truss

例句：

1. 1. The construction of the bridge required the use of a Pratt truss system.
   建造这座桥需要使用普拉特桁架系统。
2. 2. The engineer designed a Pratt truss to support the weight of the building.
   工程师设计了一个普拉特桁架来支撑建筑物的重量。
3. 3. The Pratt truss was a critical component in the design of the bridge.
   普拉特桁架是桥梁设计中的关键组成部分。