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Strengthening ridges
Practical Action
How to make a Metal-bending Machine – Workshop Equipment 10
R.D. Mann, Practical Action Publishing
Basic Blacksmithing: An introduction to toolmaking, David Harries, Practical Action
Publishing, 1993
Blacksmithing Instructors’ Guide: Sixteen lesson plans with teaching advice, David
Harries, Practical Action Publishing, 1993
Practical Action
The Schumacher Centre
Rugby, Warwickshire, CV23 9QZ
United Kingdom
Tel: +44 (0)1926 634400
Fax: +44 (0)1926 634401
Practical Action is a development charity with a difference. We know the simplest ideas can have the
most profound, life-changing effect on poor people across the world. For over 40 years, we have been
working closely with some of the world’s poorest people - using simple technology to fight poverty and
transform their lives for the better. We currently work in 15 countries in Africa, South Asia and Latin