ring from your grandma's collection that you love flaunting every now and then, gold ornaments often become an extension of your persona. but how well do you know your gold jewellery ?...
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outside of the brazed joint. notice in the photo how the recessed material has a concave shape to it. the "meniscus" of any liquid is the curved shape of the surface of that liquid caused by surface tension. a meniscus can be either concave (desirable in brazed joints) or convex. in fig. , there is a...