Tafel I. 



DPUek = 0.089 mm. 



M 



-4- 



DrUCk = 0. 25 mm. 



f fc' 



-ffrti 



300 400 500 



700 800 900 o 100 200 300 400 500 600 700 



900 1000 1 



7 8 9 



