It is as it is producing the PCB boards for the high voltage
foundation and even condenser for 3-500Z 50MHz amplifiers.
Attaching the paper that attaches polypropylene tape to the PCB board to
the entire surface and painted a pattern in the top I cut paper and tape
with a cutter.
It is as I peeled paper and, tape that wrote the pattern.
I put in it into corrosion liquid hereafter.
It is the picture after the hole is opened, after put in into corrosion
liquid and finished.
The processing of the aluminum board for the shield.
The picture that assembled the shield box.