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Test # 126


1.
TEACHER : INSTRUCTION ::

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Idiom of the Day

speak of the devil (and he appears)
to appear just when someone is talking about you
"Speak of the devil and he appears," I said as our colleague who we were talking about walked in the door.
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  • Precautions while using Centrifuge

    Protective inner safety lid

    For centrifuges with swinging bucket rotors, fasten a protective inner safety lid (if available for your model centrifuge) onto the bucket; for those with fixed angle rotors, fasten an inner safety lid to the rotor before centrifugation. Ensure that the safety lid is properly sealed and positively locked into place.


    Chourishi Systems