fixed bolster

例句：

1. 1.The engineer fixed the broken pipe with a new bolster.
   工程师用一个新的固定支座修复了断裂的管道。
2. 2.The car was fixed with a new bolster before it left the factory.
   汽车在出厂前被用一个新的固定支座修理过。
3. 3.The old house needed a new bolster to support its weight.
   这座老房子需要一个新的固定支座来支撑其重量。