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  2. Jackhammer - Wikipedia

    en.wikipedia.org/wiki/Jackhammer

    These tools are typically used to break up rock, pavement, and concrete. A jackhammer operates by driving an internal hammer up and down. The hammer is first driven down to strike the chisel and then back up to return the hammer to the original position to repeat the cycle.

  3. Digging bar - Wikipedia

    en.wikipedia.org/wiki/Digging_bar

    A lining bar is used to shift the alignment of railroad tracks, to manipulate some types of railroad track jacks, to "nip up" or lift ties and rails, and as a digging tool. Lining bars have a tapered form. They often have a square cross section between one and 1-1/2 inches at one end. They may have a pyramidal, wedge, or pinch point.

  4. Rubblization - Wikipedia

    en.wikipedia.org/wiki/Rubblization

    A hydraulic breaker creates concrete rubble. Rubblization is a construction and engineering technique that involves saving time and transportation costs by reducing existing concrete into rubble at its current location rather than hauling it to another location. Rubblization has two primary applications: creating a base for new roadways and ...

  5. Hammer drill - Wikipedia

    en.wikipedia.org/wiki/Hammer_drill

    Although each blow is of relatively low force, these thousands of blows per minute are more than adequate to break up concrete or brick, using the masonry drill bit's carbide wedge to pulverize it for the spiral flutes to whisk away. For this reason, a hammer drill drills much faster than a regular drill through concrete, brick, and thick lumber.

  6. Breaker (hydraulic) - Wikipedia

    en.wikipedia.org/wiki/Breaker_(hydraulic)

    A breaker is mounted on the excavator on the left side Hydraulic breaker attachment on a skid-steer loader. A breaker is a powerful percussion hammer fitted to an excavator for demolishing hard (rock or concrete) structures.

  7. Trump's trade pick faces bipartisan questioning — and worry ...

    www.aol.com/finance/trumps-trade-pick-faces...

    Yet he didn't offer a concrete answer to what relief for farmers in particular might be in the offing — leading to a few tense exchanges. Pressed on business leaders who are worried, he offered ...

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