... 空心分流模 Hollow die (with cap and mandrel) 空心分流 Hollow Shape 铝板合金铝板获悉 半空心 Semi-Hollow Shape ...
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Semi-Hollow Shape 半空心
O-shape hollow metal ring 金属空心O形圈
hollow cylindrical shape 中空圆柱形
capillary shape hollow fibers 毛细管型空心纤维
We can imagine that a lump of wet clay somehow ended up in the fire, dried out, hardened and formed a hollow shape; a shape that could hold things, in a tough material.
我们可以想象一块湿泥巴最后在火上烧制，烘干，变硬，形成一件形状中空的器皿，材料简陋，不过可以盛放东西。
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