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2. Sag resistance test - Wikipedia

   en.wikipedia.org/wiki/Sag_resistance_test

   The card is then placed on a vertical surface with the thickest of the stripes at the bottom. The coating will then sag downward and the clearance of the gap that produces the thickest film stripe, not sagging completely to the stripe below, is the anti-sag index of the coating. [1]

3. Anti-trespass panels - Wikipedia

   en.wikipedia.org/wiki/Anti-trespass_panels

   Best practices also include complementing anti-trespass panels with signage and fencing, preferably fencing that cannot be cut or easily climbed, [d] for distances as long as 500 m (1,600 ft) from the station or crossing. [4] Installation of CCTV near the access points protected by the panels is also recommended. The area near the crossing ...

4. Electric gate - Wikipedia

   en.wikipedia.org/wiki/Electric_gate

   Most gate kits can be fitted with safety equipment so that these limits are achieved and so cover that part of EN13241-1. In September 2010, following two incidents in Bridgend and Manchester , when children were killed by sliding gates, the UK Health and Safety Executive issued 2 safety notices aimed at gate manufacturers and installers ...

5. Voltage sag - Wikipedia

   en.wikipedia.org/wiki/Voltage_sag

   A voltage sag (U.S. English) or voltage dip [1] (British English) is a short-duration reduction in the voltage of an electric power distribution system. It can be caused by high current demand such as inrush current (starting of electric motors, transformers, heaters, power supplies) or fault current (overload or short circuit) elsewhere on the system.

6. Self-aligned gate - Wikipedia

   en.wikipedia.org/wiki/Self-aligned_gate

   In semiconductor electronics fabrication technology, a self-aligned gate is a transistor manufacturing approach whereby the gate electrode of a MOSFET (metal–oxide–semiconductor field-effect transistor) is used as a mask for the doping of the source and drain regions. This technique ensures that the gate is naturally and precisely aligned ...

7. Platform screen doors - Wikipedia

   en.wikipedia.org/wiki/Platform_screen_doors

   Half-height platform edge doors, also known as automatic platform gates, are cheaper to install than full-height platform screen doors, which require more metallic framework for support. Some railway operators may therefore prefer such an option to improve safety at railway platforms and, at the same time, keep costs low and non-air-conditioned ...