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customs; customs house
空港の税関で荷物の検査を受ける必要があるよ。
You need to have your luggage inspected at airport customs.
税関で申告する物がないか確認しておこう。
Let's check if there's anything to declare at customs.
税関を通過するのに思ったより時間がかかった。
It took longer than I thought to get through customs.