Toepler pump
noun
Toep·ler pump
| \ ˈteplə(r)-\
Definition of Toepler pump
: a gas pump that is used to produce vacuums or to transfer gases from one part of a system to another and that operates by the alternate lowering and raising of a column of mercury with the consequent alternate production of a vacuum in one tube and the exhausting of the gas through another
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