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Chapter 113 - 112 Making of the Ground Source Heat Pump
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... "Upgrade Plan 1: Replace the circulating medium to improve the thermal exchange efficiency of the device medium. Survival points needed for the upgrade: 300"
"Upgrade Plan 2: Replace the circulating medium to enhance the circulation efficiency of the device medium. Survival points needed for the upgrade: 500"
The geothermal heat pump device assembled by Chen Xin was still an ugly thing, but compared to the jumble of parts used when first constructing the oxygen machine, this geot ...
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