 | This article needs additional citations for verification. (March 2008) |
A helium release valve, helium escape valve or gas escape valve is a feature found on some diving watches intended for saturation diving using helium based breathing gas.
| This article needs additional citations for verification. (March 2008) |
A helium release valve, helium escape valve or gas escape valve is a feature found on some diving watches intended for saturation diving using helium based breathing gas.