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  2. Disposable food packaging - Wikipedia

    en.wikipedia.org/wiki/Disposable_food_packaging

    plates; beverage stirrers; food containers made of expanded polystyrene (i.e. boxes, with or without a cover) for immediate consumption without any further preparation, typically consumed from the container or ready to be consumed without further preparation; beverage containers made of expanded polystyrene, including their caps and lids; and

  3. Electrical connector - Wikipedia

    en.wikipedia.org/wiki/Electrical_connector

    A disadvantage of the circular design is its inefficient use of panel space when used in arrays, when compared to rectangular connectors. Circular connectors commonly use backshells , which provide physical and electromagnetic protection, whilst sometimes also providing a method for locking the connector into a receptacle. [ 18 ]

  4. Elastics (orthodontics) - Wikipedia

    en.wikipedia.org/wiki/Elastics_(Orthodontics)

    People using elastics for orthodontic correction change their elastics three to four times during the day. Elastic wear is recommend to be used in a rectangular wire to minimize side effects. Elastic wear depends on the compliance of the patient. A non-compliant patient should never be instructed to continue wearing elastics, for whom other ...

  5. Lead–acid battery - Wikipedia

    en.wikipedia.org/wiki/Lead–acid_battery

    Planté plates are still used in some stationary applications, where the plates are mechanically grooved to increase their surface area. In 1880, Camille Alphonse Faure patented a method of coating a lead grid (which serves as the current conductor) with a paste of lead oxides, sulfuric acid, and water, followed by curing phase in which the ...

  6. Piezoelectricity - Wikipedia

    en.wikipedia.org/wiki/Piezoelectricity

    Piezoelectric balance presented by Pierre Curie to Lord Kelvin, Hunterian Museum, Glasgow. Piezoelectricity (/ ˌ p iː z oʊ-, ˌ p iː t s oʊ-, p aɪ ˌ iː z oʊ-/, US: / p i ˌ eɪ z oʊ-, p i ˌ eɪ t s oʊ-/) [1] is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in ...

  7. Surgical mask - Wikipedia

    en.wikipedia.org/wiki/Surgical_mask

    A surgical mask serves as a mechanical barrier that interferes with direct airflow in and out of respiratory orifices (i.e. nose and mouth).Most commonly used surgical masks are designed to only trap respiratory droplets, and therefore do not filter or block fine airborne particles that are smaller than the designed filtration ratings, which may be transmitted by coughs, sneezes, unintentional ...

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