Reference

For Creosoted Wooden Railway Sleepers (Lines, Switches, Bridges)

TCDD 6. REGION DIRECTORY, 2019
TCDD 3. REGION DIRECTORY, 2020
KARDEMİR AŞ. 2020
ERDEMİR AŞ. 2020 and 2021
ERDEMİR AŞ. 2020 and 2021

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