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・ Turritella anactor
・ Turritella annulata
・ Turritella apicalis
・ Turritella attenuata
・ Turritella aurocincta
・ Turritella bacillum
・ Turritella banksii
・ Turritella bayeri
・ Turritella bicingulata
・ Turritella broderipiana
・ Turritella caelata
・ Turrentine Historic District
・ Turrentine Jones
・ Turret
・ Turret (disambiguation)
Turret (Hadrian's Wall)
・ Turret Bay
・ Turret board
・ Turret clock
・ Turret Cone
・ Turret deck ship
・ Turret gun
・ Turret Island
・ Turret lathe
・ Turret Nunatak
・ Turret Peak
・ Turret Peak (Antarctica)
・ Turret Peak (Colorado)
・ Turret Peak (Wyoming)
・ Turret Point


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Turret (Hadrian's Wall) : ウィキペディア英語版
Turret (Hadrian's Wall)

A turret was a small watch tower, incorporated into the curtain wall of Hadrian's Wall. The turrets were normally spaced at intervals of one third of a Roman mile (equivalent to ) between Milecastles, giving two Turrets between each Milecastle.〔
==Numbering system and naming==
Following the numbering system introduced by J. Collingwood Bruce in 1930, Turrets were numbered after the Milecastle located to the east of the turret. The nearest turret to the milecastle is suffixed by 'A', and the other turret by 'B'. For example, travelling west from Milecastle 33, the first Turret encountered would be Turret 33A, and the second would be Turret 33B. Both lower and upper case 'A' and 'B' suffixes are in widespread use, and the full name is often abbreviated to (for example) 'T33a'.
Many turrets also have a name, which is often shown in brackets following the number. For example, Brunton Turret is often referred to as 'Turret 26B (Brunton)'.

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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