耐火砖、块、瓦及类似耐火陶瓷建材制品，但硅质化石粉及类似硅土制的除外。
Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, other than those of siliceous fossil meals or similar siliceous earths.
这座城市甚至还铺设过排水系统，因为在窄窄的街道底下发现了许多陶土制的管道。
The city was even equipped with a drainage system, for a great many clay pipes were found beneath the narrow streets.
我们把这些压成细粉，然后混合在水泥及沙里，之后把它放在一个模盒里，作成混凝土制的产品。
We pulverise these to make it powder-like and we mix it with cement and sand and put it in a mould and turn it into concrete products.
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