Rapid PH Meter

1931~1945

fixed pulley

1953~1962

Dry Gelatin Plates－Zeng Qin Xi family's portrait

1895~1945

Oscillography

1967

Sounding regulation DEPTH GAGE

Dry Gelatin Plates－Zeng Qin Xi family's portrait

1895~1945

Public servant trainee registration certificate

1955

Desktop galvanometer

1953~1962

precision resistor

1953

Ballistic pendulum

1953~1962

Voltmeter

1931~1945

Microamperes

1951

Ballistic pendulum

1953~1962

Transcription steel stylus group

Absorbers

1953~1962

compound microscope

1952

Subject schedule at TPCKU

1963

GENERAL ELECTRIC/ TUBULAR LAMP

1953~1962

Ammeter

1931~1945

reflecting galvanometer

1953~1962