20 mm calibreの例文

• Rapid fire 20 mm calibres and 88 mm weapons were first used in Spain.
• The Iran Iraq War also saw the only confirmed helicopter dogfights in history, with 20 mm calibre canon.
• This allows a wide range of weapons to be used, including 12.7 mm machine guns and up to 20 mm calibre weapons.
• Only 4 5 hits with 20 mm calibre cannon were needed for frontal attacks on four-engined bombers, but such attacks were difficult to execute.