Pay in 4 interest-free payments of $35.50 Learn more
Ships within 48 hours · Estimated delivery Aug 3 - Aug 8
BS 4142 is used to assess the impact of industrial and commercial sound
will maintain their circuit integrity for life safety and fire-fighting
where it is considered additional security or other measures may be required to protect against the risk of vandalism
The standard has been extensively revised and includes all of the terms and definitions users need to understand if they plan to implement a quality management system to the requirements of BS EN ISO 9001:2015
BS EN 288-3
Optics and optical instruments. Reference wavelengths shop-only BS 4142 is used to1 Scope This International Standard specifies two reference wavelengths to be used for the characterization of optical materials, optical systems and instruments, as well as ophthalmic lenses. It defines the associated principal refractive indices and principal dispersions, as well as the Abbe numbers with regard to these reference wavelengths and principal dispersions.
US$ 34.99
US$ 23.00
US$ 64.00
US$ 74.99