ធនធាន ដាក់ស្លាក: Styrofoam Cement
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01 តុលា 2019 Dr. Shafer will talk about his successes organizing profitable small farmer biochar social enterprises and also his newest project to create very low-cost field-to-market cold store systems that allow farmers to grow delicate, high value crops and get them to market in good shape. He uses a...