Construction technique of pressure filling concrete to still pipe inner arch of 75m span tie bar arch bridge 系杆拱桥钢管拱内混凝土的压注施工工艺研究
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Numerical simulations for different grain models show that the high frequency longitudinal acoustic oscillations could he generated at the moment of pressure filling 摘要固体火箭发动机中声波振荡是引起不稳定燃烧的一个重要原因。
