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A comment on Swedish Couple Builds Greenhouse Around Home. Parent comment

Re:Swedish Couple Builds Greenhouse Around Home by furtive808 on Friday June 21, 2019 @06:39PM (#20246843)
Most greenhouses have ventilation windows, often using a wax piston to automatically open/close windows based on the temperature.
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Re:Swedish Couple Builds Greenhouse Around Home by noir_lord on Friday June 21, 2019 @08:40PM (#20247323)
Had never seen a wax piston, that’s a tremendously elegant design.
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