例文
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- Indicator loops were used to detect the presence of any submerged submarines.
- The indicator loop was completed by HMAS Bangalow by early March 1943.
- The indicator loop in the Brisbane River was removed in June 1945.
- Indicator loop technology was quickly developed further and deployed by the US Navy in 1942.
- These monitored and controlled the guard indicator loops and mine loops set in the North West Channel.