出典:Wikipedia
出典:『Wikipedia』 (2011/06/02 20:25 UTC 版)
The W47 was an American thermonuclear warhead used on the Polaris A-1 sub-launched ballistic missile system. Various models were in service from 1960 through the end of 1974. The warhead was developed by the Lawrence Radiation Laboratory between 1957 and 1960.