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BL 12-inch railway gun : ウィキペディア英語版 | BL 12-inch railway gun
The Ordnance BL 12 inch gun Mk IX on truck, railway mounted surplus 12 inch Mk IX W naval guns, manufactured by Woolwich Arsenal in 1906,〔Hogg & Thurston 1972, Page 192. At least 1 of the guns may have been manufactured during World War I, as ('British 12"/40 (30.5 cm) Mark IX' ) states that only 3 Mk IXw guns were actually originally built but that 6 more were made during World War I.〕 on various railway platforms to provide mobile long-range heavy artillery on the Western Front in World War I. ==History== Vickers mounted 2 Mk IX W guns on slightly different railway mountings, Mk I, from September 1915. They are both identified by the open-frame appearance, recoil buffers above the barrel and the bogies with frames between the wheels similar to locomotive bogies. One mounting has a distinctive diamond-shape from the side and has a warping winch on the front; the other's carriage has a more squared-off profile with no warping winch at the front. Elswick Ordnance Company (Armstrongs) mounted 2 more on its own design of Mk II railway mounting, delivered to the Western Front in August 1916. They are identified by the boxed-in frame appearance, recoil buffers below the barrel and the bogies with frames outside the wheels.
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