When circumjacent load makes the lowest natural frequency zero, critical load is obtained.
当周边面力使夹层圆板的最低固有频率为零时，就可获得临界载荷的值。
Face stability is key point of tunnel shields excavation, Which influenced circumjacent environment.
开挖面的稳定是盾构施工技术的关键问题，直接影响到周边环境。
Circumjacent environment is good, traffic is convenient, fashionable and luxurious elevator building.
周围环境杰出，交通很便利，时尚豪华的电梯洋楼。
So the circumjacent welding should be applied at this spot and another join symmetrical to it, all sides of the place at which Angle iron join are welded around with the main beam.
因此应该在该位置以及与之对称的另一联接点处都应采用周边焊，使角钢连接处的各边全部焊接，然后再与大梁周边焊接。
After recent price rise of the storm, current local seamless steel tube prices and circumjacent market price, and even higher than shorten the price of some cities, so the price advantage is weakened.
历经近期的涨价风波后，目前本地无缝钢管市场价格与周边市场的价差缩短，甚至还高于有的城市的价格，因此价格优势有所减弱。
After recent price rise of the storm, current local seamless steel tube prices and circumjacent market price, and even higher than shorten the price of some cities, so the price advantage is weakened.
历经近期的涨价风波后，目前本地无缝钢管市场价格与周边市场的价差缩短，甚至还高于有的城市的价格，因此价格优势有所减弱。
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