土鼓
土鼓-
鼓腔用陶土烧制－－是土鼓的遗存。
The drum cavity is made of pottery clay , inherited from the earth drum .
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陶鼓又称土鼓，是用陶土烧制成鼓框，再蒙上动物的皮革做成的。
Pottery drum , also known as drum soil , clay is fired into the dark box , and then cast made of animal leather .
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土中爆破鼓包运动过程的X光摄影研究
X-ray radiographic research on the process of mound development in soil by blasting
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土中爆破鼓包运动过程可分成两个阶段：第一阶段是由应力波在自由面反射造成的运动；
The process of mound movement in blasting can be devided into two stages . In the first stage the mound movement is caused by the stress wave and the wave reflected from free surface ;