Space environment (natural and artificial). Geomagnetic reference models1 Scope This International Standard defines reference models representing the geomagnetic field. It closely mirrors and clarifies specifications which have been in use for many decades. The approach is to represent the corresponding scalar magnetic potential by a spherical harmonic expansion having specified numerical coefficients, called Gauss coefficients. This International Standard covers models in which, at any one time, changes of the magnetic

Note 2: BS EN 1434‑5 does not cover electrical safety requirements

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BS ISO 6150:2018 includes a technical change with respect to BS ISO 6150:1988:

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NOTE Crawler machines used in underground mining applications might have other regional or local brake system requirements

A hollow axle is an axle of homogeneous steel

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autocatalytic plating (commonly referred to as electroless plating