fixed piston sampler

例句：

1. 1. The fixed piston sampler is used to collect samplesfrom the engine for testing.
   固定活塞取样器用于从发动机中取样进行测试。
2. 2. Theengineer used the fixed piston samplerto inspect the engine's performance.
   工程师使用固定活塞取样器检查发动机的性能。
3. 3. Thefixed piston sampler was a criticaltool in the automotive industry duringWorld War II.
   固定活塞取样器在二战期间的汽车工业中是一个关键的工具。