Industrial Technician exam qualification certificate

1953

Wooden class schedule from curriculum division

1956

tuning fork

1953~1962

power supply

1965

Personal seal of Dr. Jer-Ru Ma

1988~1994

Wheatstone bridge

1953~1962

Slide rule

Forceps

1953~1962

cover of torsion balance

1953~1962

Architects Certificate

1972

galvanometer

1931~1945

Taiwan Provincial Institute of Technology,Student Course Selection book

1948

Taiwan Provincial Cheng Kung University student manual

1961

Font

Standard resistance

1953~1962

Leica SD200

1994

cover of torsion balance

1953~1962

Taiwan Provincial Architectural Technician Association membership certificate

1954

precision resistor

1931~1968

Pressure gauge 2