f-k filtering

例句：

1. 1. The company uses f-k filtering to ensure the quality ofits products.
   该公司使用过滤技术确保其产品的质量。
2. 2. During the election, f-k filtering was used to identify potentialcandidates.
   在选举期间，使用了过滤技术来识别潜在的候选人。
3. 3. The f-kfiltering process is crucial for removing impurities from the water.
   过滤过程对于从水中去除杂质至关重要。