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  2. Spring-tooth harrow - Wikipedia

    en.wikipedia.org/wiki/Spring-tooth_harrow

    Harrows, whether spring tooth, spike tooth or disc harrows can have a drag connection or have a 3 point mounting. A drag harrow is pulled and cannot be backed up. Three point implements can be raised and lowered hydraulicly and maneuvered more easily. A spring-tooth harrow is a type of harrow, and specifically a type of tine harrow. It uses ...

  3. Harrow (tool) - Wikipedia

    en.wikipedia.org/wiki/Harrow_(tool)

    The disk harrow is used first to slice up the large clods left by the mould-board plough, followed by the spring-tooth harrow. To save time and fuel they may be pulled by one tractor; the disk hitched to the tractor, and the spring-tooth hitched to, and directly behind, the disk. The result is a smooth field with powdery dirt at the surface.

  4. Drag harrow - Wikipedia

    en.wikipedia.org/wiki/Drag_harrow

    A 4-foot drag harrow A larger, 12 foot drag harrow simply uses three four foot sections that are connected. A drag harrow, a type of spring-tooth harrow, is a largely outdated type of soil cultivation implement that is used to smooth the ground as well as loosen it after it has been plowed and packed.

  5. List of orthodontic functional appliances - Wikipedia

    en.wikipedia.org/wiki/List_of_Orthodontic...

    Components such as Palatal Finger Springs, Buccal Canine Retractor, Z-Spring, T-Spring, Coffin Spring, Active Labial Bows (Mill's Bow or Roberts retractor), Screws and Elastics are all considered to be active components of the removable functional appliances. If a spring is moving one tooth it is made of 0.5mm thick stainless steel wire.

  6. List of palatal expanders - Wikipedia

    en.wikipedia.org/wiki/List_of_palatal_expanders

    In 2005 Garib et al., [5] stated in their study that tooth-borne (Hyrax) and tooth tissue-borne (Haas-type) expanders tended to produce similar orthopedic effects. In both methods, RME led to buccal movement of the maxillary posterior teeth, by tipping and bodily translation.

  7. File:12 foot spring-tooth drag harrow.jpg - Wikipedia

    en.wikipedia.org/wiki/File:12_foot_spring-tooth...

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  8. Three-point hitch - Wikipedia

    en.wikipedia.org/wiki/Three-point_hitch

    The three-point hitch (British English: three-point linkage) is a widely used type of hitch for attaching ploughs and other implements to an agricultural or industrial tractor.

  9. Disc harrow - Wikipedia

    en.wikipedia.org/wiki/Disc_harrow

    Primary heavy duty disc harrows of 265 to 1,000 pounds (120 to 454 kg) per disc are mainly used to break up virgin land, to chop material/residue, and to incorporate it into the top soil. Lighter secondary disc harrows help completely incorporate residue left by a primary disc harrow, eliminate clumps, and loosen the remaining packed soil.