Bottom boards of aluminium alloys for moulding bohes having inside dimensions: length from 400 to 500 mm, width from 300 to 400 mm. Construction and dimensions
State system for ensuring the uniformity of measurements. State primary standard and all-union verification schedule for means measuring mass flow of gas within the range of 4x10 in minus 2 degree up to 2,5x10 in 2 degree kg/sec
