Measuring instrument for Scholander gas analysis apparatus
1955-1960
Frequency and time measuring instrument type TSA3436 by Venner Electronics Limited
1956
Measuring instrument for Scholander gas analysis apparatus
1955-1960
Instrument for measuring fire damp in mines
Frequency and time measuring instrument type TSA3436 by Venner Electronics Limited
1956
Instrument for measuring fire damp in mines
Instrument for measuring fire damp in mines
Cambridge & Paul measuring instrument
1923