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Instrument, Concise Cast Iron Magdeburg Hemispheres Experiment, Suitable for Family For School

<ul><li>This instrument is  for high school science class to explain atmospheric pressure</li><li>This product consists of two cast iron hemispheres with pull rings. The two hemispheres are combined with each other to form a sealed container.  of the hemispheres has a gas guide valve. The  in the sealed hemisphere can be withdrawn through the valve</li></ul>

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<br/><b>Specification:</b><br/>Item Type: Magdeburg Hemispheres<br>Material: Cast Iron<br>Color: Black<br><br>Instructions:<br>Wipe the contact surfaces of the two hemispheres, apply them with grease such as petrolatum, and rotate the two hemispheres relatively, then press firmly. Open the  guide valve, pump it with the pumping device, and after the gas is exhausted, close the valve. The instrument pull  can hang a weight or pulled by the student, and the two hemispheres cannot be separated. Open the valve to make the  enters the ball. At this time, the  pressure is balanced inside and outside, and the two hemispheres are immediately separated.<br><br>Maintenance &amp; Repair:<br>Do not hit or drop the instrument to prevent the hemisphere from being broken causing the seal is not . Do not come into contact with corrosive objects and gases. <br/><br/><b>Package List:</b><br/><div>1 x Magdeburg Hemispheres with Pull </div><div>1 x Petrolatum</div> <br/>

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