PABRIK REL KERETA API: Proses pembuatan Roda Kereta Api Dan Bantalan Beton Yang Wajib Kamu Lihat
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zafar
01 Jul 2021
trains are the most widely used means of mass transportation. Trains run on iron tracks and iron wheels. The train has a very heavy weight so that the runway needs a very strong grip. 80% of the material for making trains is thick and solid steel.
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