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It is quite difficult and not cheap to buy a good thermos. The proposed industrial versions of thermoses are not always convenient, so sometimes you have to improvise, making a thermos with your own hands. Especially since there is an alternative to the industrial product, and it is quite easy to make a good thermos …
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There is a lot of debate about the effectiveness of LED-based phytolamps. It is desirable to have an artificial source of light useful to plants for growing seedlings in poorly lit areas. To test the effect of phytolamp on plants, it is not necessary to buy it, but can be made with your own hands. …
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