Thumb-operated safety for boltaction firearms
作者： Carl H Benson
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lens.org 参考文章(5)
Roy E Weatherby, Firearm breech bolt mechanism with a bolt stop ,(1959)
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Margaret W Brewer, Trigger safety for bolt action rifle ,(1961)
Roy E Weatherby, Trigger and safety mechanism for firearms ,(1959)
David Wackrow Roger, Alfred Perry Claude, Bolt lock for a rifle ,(1954)