Iron pattern plates for moulding boxes having inside dimensions 1000x800 mm for moulding foundry machines with turn of half mould with squeezing. Design and dimensions
Occupational safety standards system. Respiratory protective devices. Methods of test and test equipment. Part 4. Determination of gas capacity, internal migration/desorption of gas and combined filters using constant air flow and breakthrough time of filters against carbon monoxide using sinusoidal air flow