20.E.1."Technology", in accordance with the General Technology Note, for the "development", "production" or "use" of equipment or "software" specified in 20.A., 20.B. or 20.D.

+----------------------------------------------+------------------------------------------------------------+
| UNITS, CONSTANTS, ACRONYMS AND ABBREVIATIONS | |
| | |
| USED IN THIS ANNEX | |
+==============================================+============================================================+
| | |
+----------------------------------------------+------------------------------------------------------------+
| ABEC | Annular Bearing Engineers Committee |
+----------------------------------------------+------------------------------------------------------------+
| ABMA | American Bearing Manufactures Association |
+----------------------------------------------+------------------------------------------------------------+
| ANSI | American National Standards Institute |
+----------------------------------------------+------------------------------------------------------------+
| Angstrom | 1 x 10^(–10) metre |
+----------------------------------------------+------------------------------------------------------------+
| ASTM | American Society for Testing and Materials |
+----------------------------------------------+------------------------------------------------------------+
| bar | unit of pressure |
+----------------------------------------------+------------------------------------------------------------+
| °C | degree Celsius |
+----------------------------------------------+------------------------------------------------------------+
| cc | cubic centimetre |
+----------------------------------------------+------------------------------------------------------------+
| CAS | Chemical Abstracts Service |
+----------------------------------------------+------------------------------------------------------------+
| CEP | Circular Error Probable or Circle of Equal Probability |
+----------------------------------------------+------------------------------------------------------------+
| dB | decibel |
+----------------------------------------------+------------------------------------------------------------+
| g | gram; also, acceleration due to gravity |
+----------------------------------------------+------------------------------------------------------------+
| GHz | gigahertz |
+----------------------------------------------+------------------------------------------------------------+
| GNSS | Global Navigation Satellite System e.g. |
| | |
| | BeiDou |
| | |
| | Galileo |
| | |
| | GLONASS – Global’naya Navigatsionnaya Sputnikovaya Sistema |
| | |
| | GPS – Global Positioning System |
+----------------------------------------------+------------------------------------------------------------+
| h | hour |
+----------------------------------------------+------------------------------------------------------------+
| Hz | hertz |
+----------------------------------------------+------------------------------------------------------------+
| HTPB | Hydroxy–Terminated Polybutadiene |
+----------------------------------------------+------------------------------------------------------------+
| ICAO | International Civil Aviation Organisation |
+----------------------------------------------+------------------------------------------------------------+
| IEEE | Institute of Electrical and Electronic Engineers |
+----------------------------------------------+------------------------------------------------------------+
| IR | Infrared |
+----------------------------------------------+------------------------------------------------------------+
| ISO | International Organization for Standardization |
+----------------------------------------------+------------------------------------------------------------+
| J | joule |
+----------------------------------------------+------------------------------------------------------------+
| JIS | Japanese Industrial Standard |
+----------------------------------------------+------------------------------------------------------------+
| K | Kelvin |
+----------------------------------------------+------------------------------------------------------------+
| kg | kilogram |
+----------------------------------------------+------------------------------------------------------------+
| kHz | kilohertz |
+----------------------------------------------+------------------------------------------------------------+
| km | kilometre |
+----------------------------------------------+------------------------------------------------------------+
| kN | kilonewton |
+----------------------------------------------+------------------------------------------------------------+
| kPa | kilopascal |
+----------------------------------------------+------------------------------------------------------------+
| kW | kilowatt |
+----------------------------------------------+------------------------------------------------------------+
| m | metre |
+----------------------------------------------+------------------------------------------------------------+
| MeV | million electron volt or mega electron volt |
+----------------------------------------------+------------------------------------------------------------+
| MHz | megahertz |
+----------------------------------------------+------------------------------------------------------------+
| milligal | 10⁻⁵ m/s² (also called mGal, mgal or milligalileo) |
+----------------------------------------------+------------------------------------------------------------+
| mm | millimetre |
+----------------------------------------------+------------------------------------------------------------+
| mm Hg | mm of mercury |
+----------------------------------------------+------------------------------------------------------------+
| MPa | megapascal |
+----------------------------------------------+------------------------------------------------------------+
| mrad | milliradian |
+----------------------------------------------+------------------------------------------------------------+
| ms | millisecond |
+----------------------------------------------+------------------------------------------------------------+
| µm | micrometre |
+----------------------------------------------+------------------------------------------------------------+
| N | newton |
+----------------------------------------------+------------------------------------------------------------+
| Pa | pascal |
+----------------------------------------------+------------------------------------------------------------+
| ppm | parts per million |
+----------------------------------------------+------------------------------------------------------------+
| rads (Si) | radiation absorbed dose |
+----------------------------------------------+------------------------------------------------------------+
| RF | radio frequency |
+----------------------------------------------+------------------------------------------------------------+
| rms | root mean square |
+----------------------------------------------+------------------------------------------------------------+
| RNSS | Regional Navigation Satellite System e.g. |
| | |
| | NavIC – Indian Regional Navigation Satellite System |
| | |
| | QZSS – Quasi Zenith Satellite System |
+----------------------------------------------+------------------------------------------------------------+
| rpm | revolutions per minute |
+----------------------------------------------+------------------------------------------------------------+
| RV | Re-entry Vehicles |
+----------------------------------------------+------------------------------------------------------------+
| s | second |
+----------------------------------------------+------------------------------------------------------------+
| Tg | glass transition temperature |
+----------------------------------------------+------------------------------------------------------------+
| Tyler | Tyler mesh size, or Tyler standard sieve series |
+----------------------------------------------+------------------------------------------------------------+
| UAV | Unmanned Aerial Vehicle |
+----------------------------------------------+------------------------------------------------------------+
| UV | Ultra violet |
+----------------------------------------------+------------------------------------------------------------+
+-----------------------------------------+-----------------+----------------------------------------------------------+
| TABLE OF CONVERSIONS USED IN THIS ANNEX | | |
+=========================================+=================+==========================================================+
| Unit | Unit | Conversion |
| | | |
| (from) | (to) | |
+-----------------------------------------+-----------------+----------------------------------------------------------+
| bar | pascal (Pa) | 1 bar = 100 kPa |
+-----------------------------------------+-----------------+----------------------------------------------------------+
| g (gravity) | m/s² | 1 g = 9.806 65 m/s² |
+-----------------------------------------+-----------------+----------------------------------------------------------+
| mrad (millirad) | degrees (angle) | 1 mrad ≈ 0.0573^(°) |
+-----------------------------------------+-----------------+----------------------------------------------------------+
| rads | ergs/gram of Si | 1 rad (Si) = 100 ergs/gram of silicon (= 0.01 gray [Gy]) |
+-----------------------------------------+-----------------+----------------------------------------------------------+
| Tyler 250 mesh | mm | for a Tyler 250 mesh, mesh opening 0.063 mm |
+-----------------------------------------+-----------------+----------------------------------------------------------+
Statement of Understanding
Members agree that, in those cases where the term "national equivalents" are specifically allowed as alternatives to specified International Standards, the technical methods and parameters embodied in the national equivalent would ensure that the requirements of the standard set by the specified International Standards are met.