This is PLHe-209 out of it you can get 8
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Article
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1968
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Elsevier Science
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English
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PLHe-209 is a new helium liquefier. A fully automatic condensation plant from Philips. Unique. This is what makes it so. The helium gas is cooled at four distinct temperature levels. Apart from the obvious thermodynamic advantages, this arrangement optimises refrigeration output -so much so that no