working level month造句

In the mining industry, the exposure is traditionally measured in " working level " ( WL ), and the cumulative exposure in " working level month " ( WLM ); 1 WL equals any combination of short-lived 222 Rn daughters ( 218 Po, 214 Pb, 214 Bi, and 214 Po ) in 1 liter of air that releases 1.3 ?10 5 MeV of potential alpha energy;
The mining industry traditionally measures exposure using the " working level " ( WL ) index, and the cumulative exposure in " working level months " ( WLM ) : 1 WL equals any combination of short-lived 222 Rn progeny ( 218 Po, 214 Pb, 214 Bi, and 214 Po ) in 1 liter of air that releases 1.3 ?10 5 MeV of potential alpha energy; one WL is equivalent to 2.08 ?10 " 5 joules per cubic meter of air ( J / m 3 ).
It's difficult to find working level month in a sentence. 用working level month造句挺难的