ធនធាន ដាក់ស្លាក: Bellowa
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01 មករា 1981 This Technical Bulletin shows an inexpensive way to make bellows, the air pump traditionally used by blacksmiths to make fires hotter. The design here will supply enough air to make a fire that is hot enough to melt steel. It can be built entirely from locally available scrap materials, with the...
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