Oscillator, modulator and regulation tubes with anode dissipated power above 25 W. Method of measurement of leakage currents between electrodes and between cathode and heater
Pattern plates with shallow changeable wooden inserts for moulding boxes having inside dimensions 400x300 mm, 450x350 mm, 500x400 mm for moulding foundry machines without turn of half mould with squeezing. Design and dimensions
