📕 TB.2.06 - Fabricating concrete rings.

   [**<https://app.box.com/s/56qxnksmq6q5ckrxcof25gprb1bqdg3w**>](<https://app.box.com/s/56qxnksmq6q5ckrxcof25gprb1bqdg3w>)

https://app.box.com/s/56qxnksmq6q5ckrxcof25gprb1bqdg3w

Source : MSF - Public health engineering in precarious situations.