Such a tool would work if in wood handle metal brushes to punch the metal plate. The tool will be indispensable in the preparation of surfaces for repainting plate conveniently scrape loose layers of old paint and brush to clean up space for the new.
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EXPANDER “DONUT”
Known expander for training the hands, made in the form of a ring. The proposed option differs in that it consists of several inserted one into the other rings. External 1 has on the...
OBJECTIVE EXAMINER
In the sixth issue of our magazine in 1974 we told about the device "Pulse" for the control of knowledge of students. Practice operating the machine created by the participants NTTM...