Artificial bone and egg shells make good building materials due to their makeup of proteins and minerals.
人造骨和蛋壳是很好的建筑材料，因为它们由蛋白质和矿物质构成。
Steel egg-shaped sludge digestion tank is fit for building large-capacity digestion tank. In order to adapt the situation of planning market, it is necessary to develop this sludge digestion tank.
钢制蛋形消化槽适合于建立大容量的消化池，为了适应设计市场的这种形势，设计开发蛋形消化槽是非常必要的。
Steel egg-shaped sludge digestion tank is fit for building large-capacity digestion tank. In order to adapt the situation of planning market, it is necessary to develop this sludge digestion tank.
钢制蛋形消化槽适合于建立大容量的消化池，为了适应设计市场的这种形势，设计开发蛋形消化槽是非常必要的。
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