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2. Electromagnetic door holder - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_door_holder

   An electric current typically energizes the electromagnet to attract and hold the steel plate, keeping the door open. Unlike electromagnetic locks, the magnetic attraction of an electromagnetic door holder is usually weak enough that it can be manually overpowered at any time by anyone, allowing the door to close. [citation needed]

3. Curtain tie-back - Wikipedia

   en.wikipedia.org/wiki/Curtain_tie-back

   A pair of double-tassel tie-backs. A curtain tie-back is a decorative window treatment which accompanies a cloth curtain.Within the field of interior decoration, tie-backs made of fabric are classified as a kind of "soft furnishing" (along with other fabric-based décor such as pillows, valances, towels, blankets, mattresses, bed skirts, bedspreads, jabots, and shower and window curtains ...

4. Electromagnetic lock - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_lock

   Given the relative permeability of a material can vary from around 250 for cobalt to around 5000 for soft iron and 7000 for silicon–iron, the choice of magnetic core can therefore have an important impact upon the strength of a magnetic lock. Also relevant is the choice of current, number of loops and effective length of the electromagnet.

5. Tieback - Wikipedia

   en.wikipedia.org/wiki/Tieback

   Tieback may refer to: Tieback (geotechnical), a method of supporting retaining walls; Tieback (subsea), a connection between a new oil and gas discovery and an existing production facility, such as the Brae oilfield; Curtain tie-back, a kind of decorative window treatment

6. Curtain - Wikipedia

   en.wikipedia.org/wiki/Curtain

   Curtains vary according to cleanability, ultraviolet light deterioration, oil and dust retention, noise absorption, fire resistance, and life span. Curtains may be operated by hand, with cords, by press-button pads or remote-controlled computers. They are held out of the way of the window by means of curtain tie-backs. Measuring curtain sizes ...

7. Holding current (electronics) - Wikipedia

   en.wikipedia.org/wiki/Holding_current_(electronics)

   The latching current in less than the holding current. The holding current (hypostatic) for electrical, electromagnetic, and electronic devices is the minimum current which must pass through a circuit in order for it to remain in the 'ON' state.