| 21. | The difference between the signs is how much tritium the manufacturer installs.
|
| 22. | Tritium is used to illuminate the iron sights of some small arms.
|
| 23. | Tritium exists naturally in the environment, but in very small quantities.
|
| 24. | Tritium lighting is legal in most of Asia and Australia.
|
| 25. | The P225 has tritium fixed sights; P6s had fixed sights only.
|
| 26. | Construction of Saltstone and of the Replacement Tritium Facility began in 1986.
|
| 27. | Today the plant makes tritium and radioisotopes, not plutonium.
|
| 28. | Chapelcross produced tritium for the Aldermaston via secure road convoys.
|
| 29. | Then they intended to introduce another hydrogen isotope, tritium.
|
| 30. | Physicists hoped to achieve deuterium-tritium break-even in 1989.
|
