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| 1952 | Hock Huat Seng Contractor Pte. Ltd.
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| 1953 | Hl (d&b) Engineering Pte. Ltd.
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| 1954 | H P Construction & Engineering Pte Ltd
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| 1955 | H&h Metal Construction Pte. Ltd.
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| 1956 | Hwa Aik Engineering Pte. Ltd.
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| 1957 | Ham Engineering Pte Ltd
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| 1958 | Hui Fok Pte Ltd
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| 1959 | Huang Kee Building Maintenance Pte. Ltd.
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| 1960 | Hon Builder Pte. Ltd.
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| 1961 | Hisaka (singapore) Pte. Ltd.
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| 1962 | Hiap Ngai Engineering Pte Ltd
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| 1963 | Hong Soon Seng Construction & Trading Pte Ltd
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| 1964 | Hong Shin Builders Pte Ltd
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| 1965 | Hwa Tai Heng Enterprises Pte. Ltd.
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| 1966 | Heng Li Air Condition Engineering Pte Ltd
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| 1967 | Hong Meng Interior Design (s) Pte Ltd
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| 1968 | Helmsion Engineering Pte. Ltd.
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| 1969 | H & W Communications Pte Ltd
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| 1970 | Hwa Sheng Construction Pte Ltd
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| 1971 | Hock Chuan Hong Waste Management Pte Ltd
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| 1972 | Hys Enterprises Pte Ltd
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| 1973 | Hong Lai Huat International Pte. Ltd.
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| 1974 | Hang Hong Contractor Pte Ltd
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| 1975 | Hoe Hock Electrical Engineering Pte Ltd
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| 1976 | Huat Builders Pte Ltd
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| 1977 | Heng Hong Development Pte Ltd
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| 1978 | Hi Light Electrical Pte Ltd
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| 1979 | Hap Hong Huat Pte. Ltd.
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| 1980 | Hoong Fung Engineering Pte Ltd
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