Sensei Otto Bakker selfdefence against four attackers with a stick. | At the 7masters course 2018 , honbu dojo NFK Netherlands, Karateschool Tamahii gave a karate selfdefence demo. Sensei Otto Bakker was
Sensei Otto Bakker selfdefence against four attackers with a stick. | At the 7masters course 2018 , honbu dojo NFK Netherlands, Karateschool Tamahii gave a karate selfdefence demo. Sensei Otto Bakker was
![Otto Jan BAKKER | BSc, MSc, PhD | The University of Manchester, Manchester | School of Mechanical, Aerospace and Civil Engineering | Research profile Otto Jan BAKKER | BSc, MSc, PhD | The University of Manchester, Manchester | School of Mechanical, Aerospace and Civil Engineering | Research profile](https://i1.rgstatic.net/ii/profile.image/276896735612930-1443028734046_Q512/Otto-Jan-Bakker.jpg)
Otto Jan BAKKER | BSc, MSc, PhD | The University of Manchester, Manchester | School of Mechanical, Aerospace and Civil Engineering | Research profile
![Otto Bakker, Bronze hatch bell with iron clapper, bell clock clock sound bronze bronze, cast Inside an iron clapper Three friezes on the top flank, the upper with bunches of grapes and Otto Bakker, Bronze hatch bell with iron clapper, bell clock clock sound bronze bronze, cast Inside an iron clapper Three friezes on the top flank, the upper with bunches of grapes and](https://c8.alamy.com/comp/R72BEH/otto-bakker-bronze-hatch-bell-with-iron-clapper-bell-clock-clock-sound-bronze-bronze-cast-inside-an-iron-clapper-three-friezes-on-the-top-flank-the-upper-with-bunches-of-grapes-and-leaf-garlands-lower-frieze-with-winged-angel-heads-and-tendrils-middle-frieze-with-inscription-casted-in-high-relief-otto-bakker-rotterdam-1748-metal-casting-communication-sound-R72BEH.jpg)