maximum exposure limits造句

例句与造句

1. Additionally, PCl 3 has been designated IDLH with a maximum exposure limit at 25 ppm.
2. The metal is so toxic that in 1949 the government adopted a maximum exposure limit of 2 micrograms per cubic meter of air over eight hours.
3. It's difficult to find maximum exposure limits in a sentence. 用maximum exposure limits造句挺难的