Aggregates are the sand, the gravel and the crushed stone used in building: in concrete, under roads and railways, and to fill the ground.

বইগুলো এখনো বাংলা ভাষায় পাওয়া যায় না — ইংরেজি সংস্করণ দেখানো হচ্ছে।
Earth and Space Sciences · পরিভাষা
Aggregates are the sand, the gravel and the crushed stone used in building: in concrete, under roads and railways, and to fill the ground.
