这些风机有很多新特征，一种优化的叶片设计，带有后部的襟翼向轮毂扩展，预浇注的混凝土基础。
These turbines are equipped with a number of new features: an optimized blade design with a spoiler extending down to the hub, and a pre-cast concrete base.
在实验室条件下采用浇注的混凝土试件代替岩石进行爆破实验，然后应用提出的方法进行了分维数计算。
The casting concrete test piece is used to carry out blasting experiment under laboratory conditions, and then calculations are conducted using fore-mentioned approaches.
研究目的：预应力混凝土连续梁采用满布支架施工时，常常因为现场浇注的混凝土量过大，而不得不分段进行施工。
Research purposes: the segmental casting method is often used in the full framing construction of prestressed concrete continuous girder because concrete casting in-site is too much.
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