How is the iron blade of a digging tool fixed to the wooden handle?
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The iron blade of soil digging tools has a ring in which the wooden handle is fixed. Normally, the ring is slightly smaller in size than the wooden handle. To fix the handle, the ring is heated and it becomes slightly larger in size (expands). Therefore, the handle easily fits into the ring.
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by heating the iron blade the iron blade expands and get fix into wooden handle
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