ring of steel

English

ring of steel (plural rings of steel)

(Britain) A form of civil protection (using closed-circuit television, control zones and restricted access) that effectively seals off city centres and financial districts; used in Northern Ireland and the City.

单词	ring of steel
释义	ring of steel English Noun ring of steel (plural rings of steel) (Britain) A form of civil protection (using closed-circuit television, control zones and restricted access) that effectively seals off city centres and financial districts; used in Northern Ireland and the City.
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