"Noise and Vibration Control Engineering Handbook" This manual starts with the basic theory of noise and vibration control technology, systematically expounds sound insulation, sound absorption, noise reduction, vibration isolation, damping vibration suppression and the latest active noise vibration control technology and Digital technology, a collection of noise and vibration control standard specifications, test methods, sound source characteristics, control equipment, product materials and engineering examples, etc., is a scientific, comprehensive, novel, practical, authoritative The large-scale reference book is also a compilation of the results of the author's work in this field for decades. 16 open hardcover. Book price 115.20 yuan (including postage).
The Floor Springs with Speed Adjustment Valves with 130-0 degree and 130-20 degree double closing speed adjustment valves is made in 304 Stainless Steel to ensure durability. Latching and closing speeds can be easily adjusted to ensure safety. The Speed Adjust Floor Springs are suitable for maximum 1500 wide door leaf and the maximum bearing weight is 130kgs. The opening maximum of the door leaf is 105 Degree, can be located at 90 degree or 105 degree.
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