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BL 8-inch howitzer Mk VI – VIII
The BL 8-inch howitzer Marks VI, VII and VIII (6, 7 and 8)〔Britain used Roman numerals to designate Marks (i.e. models) of ordnance until after World War II. Hence this article refers to the sixth, seventh and eighth models of British BL 8-inch howitzers〕 were a series of British artillery siege howitzers on mobile carriages of a new design introduced in World War I. They were designed by Vickers in Britain and produced by all four British artillery manufacturers, but mainly by Armstrong, and one American company. They were the equivalents of the German 21 cm Morser 16 and in British service were used similarly to the BL 9.2-inch howitzer, but were quicker to manufacture, and more mobile. They delivered a 200 lb shell to 12,300 yards. They had limited service in the British Army in World War II before being converted to the new 7.2-inch calibre. They also equipped a small number of Australian and Canadian batteries in World War I and by the US Army in that war. They were used in small numbers by other European armies.
==Design and variants==
8 inch was a calibre adopted in the First World War by the British Army. The Marks VI, VII and VIII (6, 7 and 8) were a new design and not related to the stopgap early Marks 1 - 5 of 8-inch howitzer, which used shortened and bored-out naval 6-inch gun barrels.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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