地下金属探测器安全检查
Safety inspection of underground metal detectors
公安刑事部门快速搜查；
The criminal Department of public security searched quickly.
检测原料、燃料、食品中的金属异物；
Detection of metal foreign substances in raw materials, fuel and food;
检查邮件、行包中的金属物品；
Check the metal items in the mail and luggage.
探查地下的管道、电缆；
Explore underground pipelines and cables;
废旧金属回收。
Waste metal recovery.