ball valve sampler

例句：

1. 1. The ball valve sampler is used to collect samples from the pipeline for testing.
   球阀采样器用于从管道中采集样本进行测试。
2. 2. The engineer used the ball valve sampler to inspect the integrity of the pipeline.
   工程师使用球阀采样器检查管道的完整性。
3. 3. The ball valve sampler was a critical tool in the process of quality control.
   球阀采样器是质量控制过程中的关键工具。