- ORIPLAN OY
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Finland
- ORION INTERNATIONAL
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India
- ORIENTAL RESEARCH CHEMICAL
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China(Mainland)
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Hongkong
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Austria
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Japan
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United Kingdom
- OSAKA SPECIAL ALLOY CO., LTD.
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Japan
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Japan
- OSK JAPAN, LTD.
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Japan
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Israel
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Philippines
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China(Mainland)
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Finland
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Japan
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Czech Republic
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India
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Finland