Through the seismic wave exploration by us in A2 and A3 working faces, the conditions, velocity, frequency and penetrating distance of seismic wave in the main mining seams are understood preliminary.
通过在A 2、A 3两个面的槽波探测工作，初步了解了其主采煤层的槽波条件、波速、频率和槽波穿透距离。
His eyes peer into the middle distance, in what one fan described as "a deep and penetrating way", and he strides confidently forward.
他的眼睛中距离的凝视着，一个粉丝描述像：“一个深沉的、让人尖叫的步伐”，同时他自信的大踏步往前走。
RFID has many advantages compared with barcode, such as long reading distance, strong penetrating object, high efficiency, large data storage capacity and so on.
与目前采用的条形码技术相比，RFID技术具有读取距离远、穿透能力强、效率高、信息量大等优势，并且在各个领域都有广泛的应用。
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