State system for ensuring the uniformity of measurements. Acoustics. Reference zero for the calibration of audiometric equipment. Part 7. Reference threshold of hearing under free-field and diffuse-field listening conditions
State system for ensuring the uniformity of measurements. Medical electrical equipment. Devices for ultrasonic diagnostics. Requirements for the declaration of acoustic output parameters in technical documents
Iron pattern plates for moulding boxes having inside dimensions 1200x1000 mm for moulding foundry machines with turn of half mould without squeezing. Design and dimensions
€10
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