Результаты (
английский) 3:
[копия]Скопировано!
a concrete is железобетоном.17. in order to reduce the number of air bubbles, which can weaken the structure, a vibrator is used.18. air bubbles are mixed in the reseal concrete in metal structure.19. the concrete has become one of the leading 20th century building materials due to its durability, flexibility, and ease of transport.
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