警けい戒かい網もう

noun

cordon; security net; alert network

Refers to a network of security or surveillance measures, such as police or military cordons, or a system of alerts.

• 警けい察さつは事じ件けん現げん場ばの周まわりに警けい戒かい網もうを張はった。

  The police set up a cordon around the crime scene.

• テロ対たい策さくのため、空くう港こうの警けい戒かい網もうが強きょう化かされた。

  The airport's security net was strengthened for counter-terrorism.