主要针对预应力箱梁在预制过程中所须的内模，在结构形式、使用原理等方面进行了研究。
This article mainly aims at the internal mold used in the process of prefabricating box-girder and conducts researches on it's structural style, activity principle and so on.
那不是建设，而是一层一层组装预应力梁构件和预制造模块的过程。预制造的时间并没有算在建设工期内。
It is not building, but, assembling the prestressed beams or prefabricated moulds, floor by floor. Fabrication does not come into the time frame.
分析预制混凝土梁（板）在施加预应力时质量缺陷的原因及其对策。
The paper analyzes reasons for quality defects as the precast girder is prestressed and raises strategies for them.
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