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| 543 | Kang Yuan Food Factory
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| 545 | Kwong Wing Trading & Credit Co
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| 546 | K Europe Holding Company Limited
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| 547 | Kim Ng Hair Salon
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| 548 | Koon Motor Service
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| 549 | Key Learning Centre
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| 550 | Ken Tuition Centre
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| 552 | Keen Minds Enrichment Centre
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| 553 | Kritpruf Communications
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| 554 | Kip Mcgrath Worldwide Education Centres (s) Pte. Ltd.
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| 555 | Kaesac Learning Centre
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| 570 | Kian Sheng Machinery Pte. Ltd.
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