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a hand-me-down
something given away after another person does not need it (especially clothes)
The girl was very poor when she was a child and always wore hand-me-down clothes.
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  • a hand-out
  • a hand-out
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  • a hang-up
  • a hard nut to crack
  • a hard sell
  • a hard-and-fast rule
  • a hassle
  • a hatchet man
  • a head shrinker
  • Idioms Quiz
  • cut across
  • pull down (someone) or pull (someone) down
  • much in evidence
  • in neutral
  • bag of tricks
  • stand for (something)
  • rooted in (something)
  • not sleep a wink
  • make (something) right/good
  • persist in (doing something)

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  • Precautions while using Centrifuge

    Balance the tubes in the rotor

    If you want to run a tube with 10 mL of liquid, put another tube with 10 mL of water in the opposing hole on the rotor (see photo, below). If the liquid has a higher or lower density than water, you must balance the tubes by mass, not volume. The total mass of each tube should be as close as possible this becomes increasingly important at very high rotor speeds. Running a centrifuge with unbalanced load could permanently damage the centrifuge. It could also cause injury to you or someone else.


    Chourishi Systems