中段为泪囊鼻腔造孔术需要凿通的部位。
The middle portion is the surgical area of the nasolacrimal fistulation.
随着造孔剂含量的增加，预制体气孔率升高。
The porosity of preforms increased with the increase of starch contents.
可通过调节造孔剂含量来控制多孔材料的性能。
The properties of the porous materials can be controlled by the content of pore forming additive.
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