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| 632 | Yue Loy Trading
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| 635 | Yong Hui Electrical Engineering Company
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| 636 | Yellow Valley Ltd.
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| 637 | Young Kids Child Care
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| 638 | Yong Sheng Huat Renovation Works
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| 639 | Yap Chai Lack Roasted Pig
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| 643 | Yinyang Australasia Pty. Ltd
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| 645 | Yuen Choon Fruits Trading
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| 646 | Yong Sheng Kopitiam
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| 647 | York Consulting Group (hk) Pte Ltd
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| 648 | Yong Yi Gong Association
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| 649 | Yap Seng Huat Seafood Supply
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| 652 | Yugen Kaisha Kereos Property
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| 656 | Yangtse Ventures
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| 657 | Yungtay Engineering Company Limited
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| 658 | Yishun Town Alumni
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