Máy khoan cắt board mạch PCB Prototyping Mits FP-21THP

Since high-frequency characteristics is necessary for RF circuit boards, it is important to
mill sharp edged lines and spaces as below

However, the lines and spaces milled by average prototyping machine with 60 degrees
milling cutter (without run-out in consideration) will result to the picture below;
un-perpendicular cutting edge, which is inadequate for RF circuit boards.