The mechanical properties of the Mogao grottoes are studied by the sonic wave test in the present paper.
利用超声检测技术确定出莫高窟北区洞窟的岩壁力学参数。
Through a theoretical analysis of a plane standing-wave sonic field a test rig on acoustic agglomeration and removal characteristics of burned coal inhalable particles has been designed and set up.
通过对平面驻波声场的理论分析，设计并建立了燃煤可吸入颗粒物声波团聚清除特性的实验台。
Making use of the principle that the sonic wave made by the rock open fracture spread in the rock, can accurately test the crack's appearance directions and extend length.
利用岩石张裂时发出的声波在岩石中的传播原理，可准确测出裂缝的形态方位和延伸长度。
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