tracer dyes meaning in English
地下水流动示踪染色料
Examples
- The investigation team led by secretary for environment , transport and works , dr sarah liao , did not find any leakage in the pipes when a tracer dye was used to test the soil stack
由环境运输及工务局局长廖秀冬率领的调查队曾用示踪感染测试污水管，当时并未发现污水管有任何裂缝。