EPISODE · Jul 23, 2021 · 48 MIN
#11~#12_下関市には世界の標準になっているものがある!?
from 関門ONAIR · host NEXCO西日本九州支社
豊浦標準砂とは?なぜ世界の基準になったのか??また、その砂の活用方法について教えます!
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#11~#12_下関市には世界の標準になっているものがある!?
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