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| 1. SHELL PAKISTAN |
| Address: Shell House 6, Ch.Khaliquzzaman Road, P.O Box 3901, Karachi. |
| Fax: 021-5684551 |
| Email: |
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| 2. SCHLUMBERGER |
| Address: 3/4 Floor, Ghausia Plaza, P.O Box 1066, Blue Area, Islamabad. |
| Fax: 2270769 |
| Email: |
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| 3. SCHLUMBERGER SEACO |
| Address: Plot 267-268, Industrial Area, Sector I-9, P.O Box 1068, Islamabad. |
| Fax: 4434743 |
| Email: |
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| 4. SUI NORTHERN GAS CO. |
| Address: State Life Building #3, Dr.Zia ud din Ahmed Road, Karachi. |
| Fax: 021-5683530 |
| Email: |
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