锡是比较容易熔化的金属。
但类似的易熔组分和添加草木灰又成为配制原始瓷铀的配方，从而过渡到原始瓷器的发明的一个重要因素。
But some similar recipe of fusible clay-plant ash mixture also played an important role in the invention of porcelain glaze in shang dynasty.
塞子可以采用几种设计中的一种，把易熔合金置于适当的位置。
The plugs may use one of several designs to hold the fusible alloy in place.
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