如果过滤器在异常短的时间后堵塞， 将它们送到实验室进行污染分析。

A If the filters become clogged after an unusually short time, send them to the laboratory for analysis of the contamination.

B When the filters become clogged in an abnormal short time, send them to the library to analyze the contamination.

C When the filters become blocked unconventionally after a very short time, send them to the lab for calculation of the contamination.