Fire extinguisher CO types have the test information stamped on the cylinder, all other types get a sticker on the back of the cylinder. Once dry, the units are recharged. Unlike the UK, the US does not rebuild extinguishers and replace valves at specific intervals unless parts are found to be defective, with the exception of halon. Halon types are often given new o-rings and valve stems at every internal maintenance to minimize any leakage potential. OEM equipment must be used for replacement parts for the extinguisher to maintain its UL rating. If parts are unavailable, replacement is recommended, keep in mind
Gas in a box gas can no longer be considered to be a Maxwell–Boltzmann gas. where "Λ" is now the thermal wavelength for massless particles. The following sections give an example of results for some specific cases. For this case: Integrating the energy distribution function and solving for "N" gives Substituting into the original energy distribution function gives which are the same results obtained classically for the Maxwell–Boltzmann distribution. Further results can be found in the classical section of the article on the ideal gas. For this case: Integrating the energy distribution function and solving for "N" gives the particle number where Li("z") is