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• Abuld-it-yourselfsolarstill（蒸馏器）isoneofthebestwaystoobt...

• 问题详情：Abuld-it-yourselfsolarstill（蒸馏器）isoneofthebestwaystoobtaindrinkingwaterinareaswheretheliquidisnotreadilyavailable.DevelopedbytwodoctorsintheU.S.DepartmentofAgriculture,it’sanexcellentwatercollector.Unfortunately,youmustcarrythenecessaryequi...
• 2020-10-2128628