Document
Finished Filters - Examples Presentation (BSF for Techs)
This presentation shows pictures of finished biosand filters (Designed for Lesson Plan 17 in the BSF for Tech Trainer Manual)
Document
Finished Filters - Examples Presentation (BSF for Techs)
This presentation shows pictures of finished biosand filters (Designed for Lesson Plan 17 in the BSF for Tech Trainer Manual)
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