Rectangular iron all-cast moulding boxes having inside dimensions: length from 400 to 500 mm, width from 300 to 400 mm, height from 100 to 200 mm. Construction and dimensions
State system for ensuring the uniformity of measurements. Permeation tubes for Sulfur Dioxide, Hydrogen Sulfide, Nitrogen Dioxide, Chlorine, Hydrogen Chloride, Ammonia. Verification method
