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  2. Polyvinyl chloride - Wikipedia

    en.wikipedia.org/wiki/Polyvinyl_chloride

    At 1.4 g/cm 3, PVC's density is also higher than structurally related plastics such as polyethylene (0.88–0.96 g/cm 3) and polymethylmethacrylate (1.18 g/cm 3).

  3. Premature ventricular contraction - Wikipedia

    en.wikipedia.org/wiki/Premature_ventricular...

    PVCs can be distinguished from premature atrial contractions because the compensatory pause is longer following premature ventricular contractions, in addition to a difference in QRS appearance. [20] In some people, PVCs occur in a predictable pattern. Two PVCs in a row are called doublets and three PVCs in a rows are triplets.

  4. List of soft contact lens materials - Wikipedia

    en.wikipedia.org/wiki/List_of_soft_contact_lens...

    Acuvue Oasys, Acuvue Oasys for Astigmatism, Acuvue Oasys for Presbyopia, Acuvue Oasys 1-Day, Acuvue Oasys 1-Day for Astigmatism, Acuvue Oasys with Transitions, Acuvue Oasys Max 1-Day, Acuvue Oasys Max 1-Day Multifocal Senofilcon C: 41: 129–147: 0.77: 0.07: Acuvue Vita, Acuvue Vita for Astigmatism Sifilcon A: 1: 32: 82: 0.08: O 2 Optix Custom ...

  5. Optical disc packaging - Wikipedia

    en.wikipedia.org/wiki/Optical_disc_packaging

    The super jewel box is the conventional case for Super Audio CD (SACD) releases; [1] a taller "Plus" size, midway between CD and DVD-Video size, is the conventional case for DVD-Audio, and as of mid-2006, the case format for all albums released by the Universal Music Group in Europe. [11]

  6. Multifocal plane microscopy - Wikipedia

    en.wikipedia.org/wiki/Multifocal_plane_microscopy

    The schematic of a multifocal plane microscope. Multifocal plane microscopy (MUM), also known as multiplane microscopy or multifocus microscopy, is a form of light microscopy that allows the tracking of the 3D dynamics in live cells at high temporal and spatial resolution by simultaneously imaging different focal planes within the specimen.

  7. Mult box - Wikipedia

    en.wikipedia.org/wiki/Mult_box

    A mult box is a device that allows a single audio source, such as a microphone, to be shared to multiple outputs for recording or broadcast. [1] A mult box is sometimes called a press box, but that term is usually reserved for the sports media's section of an arena. It may also be called a press mult box or press bridge. [2]

  8. AN/PVS-14 - Wikipedia

    en.wikipedia.org/wiki/AN/PVS-14

    The AN/PVS-14 Monocular Night Vision Device (MNVD) is in widespread use by the United States Armed Forces as well as NATO allies around the world. [3] It uses a third generation image intensifier tube, and is primarily manufactured by Litton Industries (Now L-3 Warrior Systems) and Elbit Systems of America (formerly Harris Night Vision, formerly Exelis, formerly ITT [4]). [5]

  9. Virtual circuit - Wikipedia

    en.wikipedia.org/wiki/Virtual_circuit

    A permanent virtual circuit (PVC) is a virtual circuit established for repeated/continuous use between the same DTE. In a PVC, the long-term association is identical to the data transfer phase of a virtual call. Permanent virtual circuits eliminate the need for repeated call set-up and clearing. Frame Relay is typically used to provide PVCs.