mains operated equipment
41Apollo Command/Service Module — Apollo CSM The Apollo 15 CSM in lunar orbit Description Role: Earth and Lunar Orbit Crew: 3; CDR, CM pilot, LM pilot Dimensions Height: 36.2 ft 11.03 m …
42List of British words not widely used in the United States — Differences between American and British English American English …
43District heating — Biomass fired district heating power plant in Mödling, Austria …
44Glossary of fuel cell terms — The Glossary of fuel cell terms lists the definitions of many terms used within the fuel cell industry. The terms in this glossary may be used by fuel cell industry associations, in education material and fuel cell codes and standards to name but …
452011 Christchurch earthquake — Christchurch earthquake redirects here. For other uses, see Christchurch earthquake (disambiguation). For the 13 June 2011 aftershock, see June 2011 Christchurch earthquake. February 2011 Christchurch earthquake ChristChurch Cathedral and the… …
46Switched-mode power supply — switched mode power supply. A bridge rectifier B Input filter capacitors C Transformer D output filter coil E output filter capacitors ] A switched mode power supply, switching mode power supply or SMPS, is an electronic power supply unit (PSU)… …
47High-voltage direct current — HVDC or high voltage, direct current electric power transmission systems contrast with the more common alternating current systems as a means for the bulk transmission of electrical power. The modern form of HVDC transmission uses technology… …
48Shielded metal arc welding — (SMAW), also known as manual metal arc (MMA) welding, flux shielded arc welding …
49Non-directional beacon — Radio Tower of NKR Leimen Ochsenbach, Germany This symbol denotes an NDB on an aeronaut …
50Sustainable energy — Renewable energy …
