mine in Tsukumi Shi, Ōita Ken

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日鉄鉱業株式会社大分事業所

Tsukumi-shi, 879-2459 Tsukumi-shi, Japan

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拓州建設（株）

Tsukumi-shi, 879-2461 Tsukumi-shi, Japan

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Komatsu

Usuki-shi, 875-0052 Usuki-shi, Japan

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日鉄鉱業

Tsukumi, 879-2459 Tsukumi, Japan

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戸高鉱業

Tsukumi, 879-2461 Tsukumi, Japan