Steel pattern plates with changeable metal inserts for moulding boxes having inside dimensions 600x500 mm, 800x700 mm, 1000x800 mm for moulding foundry machines with turn of half mould with squeezing. Design and dimensions
State system of ensuring the uniformity of measurements. Standard frequency and time signals radiated by specialized radio stations of the State service of time, frequency and the Earth rotation parameters determination. Main parameters
