| 摘要 |
A drainage apparatus having a spiral conduit housed inside a metal tube. Condensates flow through an inlet of the metal tube and through a chamber between the inside wall of the metal tube and the outside of the spiral tube to enter into the spiral tube. After circulating through the spiral tube, the condensates exit outside of the metal tube itself. A casing is provided that is surrounded radially by the spiral tube. Temperature readings may be taken from within the casing with a thermometer.
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