Under no circumstances should you (= you should not) approach the man. The meeting has been cancelled due to circumstances beyond our control. âº [ U ] formal events that change your life, over which you have no control: They were victims of circumstance.
1 As an example 5 years ago R22 sold for $10 per pound. 2  Today R22 can be as much as $50 per pound. 3  Typical residential air conditioning unit hold from 5 to 15 pounds of R22. 4  If a coil has to be replaced or there is a leak the cost of refilling the refrigerant could be $250 to $750. The result was a shortage of R22 and soaring prices. 2  As an example 5 years ago R22 sold for $10 per pound. 3  Today R22 can be as much as $50 per pound. 4  Typical residential air conditioning unit hold from 5 to 15 pounds of R22.
For more than 50 years, prices of carbon fiber were extremely high, and the material was viewed strictly as an exotic option for very high-end cars, such as the Chrysler Viper. Prices have steadily dropped since they were above $120 per pound ($1,000 per pound in some cases) 40 years ago.endrik Mainka, a VW project engineer, says that lignin costs about $1.1 per pound versus $1.35 per pound for PAN. Even bigger savings would come with polyethylene as a precursor, because it is less expensive ($0.92 per pound), and has a significantly higher conversion rate than lignin or PAN.