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Process board - Ridan
Process board - Jora
Process board - HotBox
Compost - internal workings of the Ridan diagram
Compost - Ridan composter
Compost - Paddles inside a Ridan composter
Compost - Jora and HotBox
Compost - HotBox
Compost - Dalek
Compost - Big Hanna T60
Compost - woodchip in scoop
Compost - Windrows in large scale composting scheme

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