| 11. | The Epiphany fire chamber, inserts and valve spring are available as performance upgrades for the Ion and SP-8.
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| 12. | Semi-automatic pistols use one firing chamber that remains fixed in a constant linear position relative to the gun barrel.
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| 13. | The wood burning stoves saw improvement through the addition of fire chambers that allowed better containment and release of smoke.
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| 14. | Failure to Feed ( FTF ) is when a firearm fails to feed the next round into the firing chamber.
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| 15. | To intensify and channel the explosion an oblong " fire chamber " was constructed on each ship, a metre in diameter.
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| 16. | The brickworks have circular shape with a firing chamber built using a technique with casts of pebbles stuck together with mortar.
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| 17. | The casemate is a simple flanking one, meaning that it has just only one firing chamber which is directed towards the north.
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| 18. | Around 1870, machined tolerances had improved to the point that the cartridge case was no longer necessary to seal a firing chamber.
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| 19. | This was something of a compromise between the other types, and offered locations in the firing chamber with a range of firing conditions.
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| 20. | Bottled oxygen can be added to the firing chamber, though this can cause an explosion of the pipe when firing, potentially injuring anyone nearby.
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