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ANG & ONG CONSULTANTS PTE LTD
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CH2M HILL SINGAPORE CONSULTING PTE LTD
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KOH BROTHERS BUILDING & CIVIL ENGINEERING CONTRACTOR (PTE.) LTD.
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OBAYASHI CORPORATION (OVERSEAS BUSINESS DIVISION)
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PUBLIC UTILITIES BOARD (WATER RECLAMATION (PLANTS) DEPARTMENT)
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ROTARY ELECTRICAL CO (PTE) LTD
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