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Volume count
Presentation with children amounts to count. There are also a number of exercises involving the concepts more, one more one less, and many are trained.Translated by
Downloadable resource (38)ICT co-ordinator, System administrator -
The construction angle
A survey of five construction contracts with K'nex, Meccano, Verti-fix, Znap, useful when working angle.Translated by
Downloadable resource (53)Organisation, company, NPO