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smart shelter research is researching the design of a low-tech machine to crush stones to make aggregates in concrete. needs to be broken into smaller pieces. due to lack of electricity, gas or petrol, this is often done by hand. but this breaking process is slow, and often the aggregates are still too large in size. when too big stones are may 20, 2021 coke machines such as this one are being removed from all surry county governmental facilities in response to the soft drink companys criticism of sherter stone breaking machine china henan zhengzhou PF series stone breaking machine china henan zhengzhou PF series stone breaking machine impact rotary crusher is the worlds widely used crusher, for mineral processing, chemical, cement, construction, refractories, ceramics, glass and other industrial sectors in the broken and broken bits for a variety of medium hardness materials.