These work in the same way as inhaled preventers, by reducing inflammation. |
|
Reduced pressure backflow preventers are more expensive, used mostly in commercial irrigation installations. |
|
Unlike relievers, preventers aren't meant to have an immediate effect and should be used as prescribed, whether or not there are symptoms. |
|
If evidence is to be called on factual issues, it is likely to be mainly about the usual industry practice relating to installation of blow-out preventers. |
|
If any sails are constrained with preventers or whisker poles these are taken down. |
|