I thank you for your speed I want to ask you what is the most important for the dimension c the tutor of 10 or the empty space of 150 thank you for all its okay advance in my research

hello everyone I'm making a pantone engine on my mower but I have a little problem adjusting the reactor I don't know if I magnetize it by turning the mower for 20 minutes or I do the adjustment with a rod in knowing that my rod c of the stainless steel of diameter 13 and the ...