İSTON A.Ş. Tuzla Fabrikası — İstanbul, Turkey
| Certificate Number | 475-CSC24-2025 | Date of certification | Nov 3, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 English |
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| Certificate Number | 475-CSC24-2025 | Date of certification | Nov 3, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 English |
| Client website — Certificate | |||
| Certificate Number | 1953-CSC24-2025 | Date of certification | Nov 4, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
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| Certificate Number | 1959-CSC24-2025 | Date of certification | Nov 5, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
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| Certificate Number | 1955-CSC24-2025 | Date of certification | Nov 5, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
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| Certificate Number | 253-CSC24-2025 | Date of certification | Nov 5, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 NL |
| Client website — Certificate | |||
| Certificate Number | 1980-CSC24-2025 | Date of certification | Nov 6, 2025 |
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| Certificate Type | Concrete, Precast | Version | 3.0 Deutsch |
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| Certificate Number | 1961-CSC24-2025 | Date of certification | Nov 6, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Client website — Certificate | |||
| Certificate Number | 204-CSC24-2025 | Date of certification | Nov 7, 2025 |
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| Certificate Type | Cement | Version | 3.0 English |
| Client website — Certificate | |||
| Certificate Number | 1940-CSC24-2025 | Date of certification | Nov 12, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Client website — Certificate | |||
| Certificate Number | 1939-CSC24-2025 | Date of certification | Nov 12, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Client website — Certificate | |||
| Certificate Number | 1914-CSC24-2025 | Date of certification | Nov 14, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 English |
| Client website — Certificate | |||
| Certificate Number | 1916-CSC24-2025 | Date of certification | Nov 14, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 English |
| Client website — Certificate | |||
| Certificate Number | 1913-CSC24-2025 | Date of certification | Nov 14, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 English |
| Client website — Certificate | |||
| Certificate Number | 1917-CSC24-2025 | Date of certification | Nov 14, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 English |
| Client website — Certificate | |||
| Certificate Number | 1915-CSC24-2025 | Date of certification | Nov 14, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 English |
| Client website — Certificate | |||
| Certificate Number | 1991-CSC24-2025 | Date of certification | Nov 14, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Certificate | |||
| Certificate Number | 1993-CSC24-2025 | Date of certification | Nov 17, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Client website — Certificate | |||
| Certificate Number | 960-CSC24-2025 | Date of certification | Nov 19, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Certificate | |||
| Certificate Number | 958-CSC24-2025 | Date of certification | Nov 19, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Certificate | |||
| Certificate Number | 910-CSC24-2025 | Date of certification | Nov 20, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Client website — Certificate | |||
| Certificate Number | 918-CSC24-2025 | Date of certification | Nov 21, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Certificate | |||
| Certificate Number | 920-CSC24-2025 | Date of certification | Nov 21, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Certificate | |||
| Certificate Number | 923-CSC24-2025 | Date of certification | Nov 21, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Certificate | |||
| Certificate Number | 921-CSC24-2025 | Date of certification | Nov 21, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
| Certificate | |||
| Certificate Number | 922-CSC24-2025 | Date of certification | Nov 21, 2025 |
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| Certificate Type | Concrete, Ready mixed | Version | 3.0 Deutsch |
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