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| 1. | On the basis of the fact that the velocity of wave in rock is changing quickly when the load acting on |
| 利用岩石介质在单轴压力作用下,纵波传播速度随应力变化的特性,以及当介质受力达到屈服点后,纵波速度急速变化的关系,探索利用纵波波速变化值来确定基础岩石开挖时的破坏标准的方法。 |
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| 2. | Load quickly! |
| 快点装! |
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| 3. | atmospheric boiler which is of high efficiency on energy transferring,non-pollution,starting and stopping quickly |
| 电加热锅炉具有能量转化效率高、零污染、起停速度快、负荷调节范围大、本体结构简单等特点，文章具体介绍了一种常压热水电锅炉的设计。 |
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