bore gauge / star gauge > calibre de ánima, hipocelómetro (cañón de fusil), topo o estrella movible

fuentes:

Diccionario politécnico de las lenguas española e inglesa
https://books.google.com/books?isbn=8479782994
Federico Beigbeder Atienza - 1997 - ‎Juvenile Nonfiction
S . standing crop l producción actual l biomasa ( oceanografía ) l cultivo en pie .... de varias aleaciones . star gage l calibre para el ánima , hipocelómetro ( cañón de fusil) ...

fundamentos balística. | Andrés Durán - Academia.edu
www.academia.edu/37018556/fundamentos_balística
Calibre. Diámetro interior del tubo. En ánimas rayadas se mide entre campos, fig. ...... Hipocelómetro Bore gauge Hipocelómetro Star gauge Horquilla Straddle I ...

Hipocelómetro - Wikipedia, la enciclopedia libre
https://es.wikipedia.org/wiki/Hipocelómetro
El hipocelómetro, topo o estrella movible era un instrumento utilizado para reconocer la artillería.

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Note added at 28 mins (2019-01-22 12:53:19 GMT)
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borescope:

Zistos - Video Borescope
https://www.zistos.com/index.php/products/.../video-borescop...
The Zistos Large Gun and Mortar Video Borescope is designed to replace the M3 ... US and foreign militaries for artillery tube inspections over the past 30+ years. ... Bore Measurement accessory replaces Pullover Gauges, STAR Gauge, and ...

Tactical Employment of Mortars - Training Command
https://www.trngcmd.marines.mil/.../MCWP 3-15.2 Tactical Emp...
Six-Mortar Star Formation ... mortar sections and platoons are not simply small artillery batteries. ..... mortars, fires fin-stabilized ammunition from a smooth bore. ..... (25) Ensures that all necessary safety, borescope, and pullover gauge ...

additional sources for star gauge:

Field Artillery Weapons of the Civil War
https://books.google.com/books?isbn=0252072103 -
James C. Hazlett, ‎Edwin Olmstead, ‎M. Hume Parks - 2004 - ‎History
Test firing continued for 500 rounds, following which a star gauge showed no bore enlargement. Five additional rounds were fired with two pounds of powder ...

Artillery - West Coast Civil War Collectors Catalog
westcoastcwc.com/cgi-bin/display_Items_Ref.asp?Cat=18...61
The star gauge is an artillery tool used to measure the true diameter of a bore at numerous points. It is used as part of the inspection procedure both at the ...

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Note added at 33 mins (2019-01-22 12:58:17 GMT)
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Measurement of Bore Erosion. - DTIC
www.dtic.mil/dtic/tr/fulltext/u2/a053146.pdf
... of erosion and its effect on cannon tube serviceability~~. UNCLASSIFlED .... star and pullover gages only indicate a change in diameter. ...

ETO, Condemnation and Replacement of Artillery Tubes in Combat
https://usacac.army.mil/cac2/cgsc/carl/eto/eto-098.pdf -
.. of the gage in the bore as the measure of serviceability.2. 10. The most reliable ... reason, the three point star gage is not as accurate as desired.