超声拉拔综合法用于检测砼的强度，可以提高测试精度。
The method of ultrasonic and pullout test can get higher precision for measuring concrete compressive strength.
系统由超声波驱动器、换能器、变幅杆、拉丝模、拉伸机等组成，通过对黄铜丝的拉拔实验，考察了超声振动对拉拔力和丝的表面质量的影响。
Through a series of drawing experiments of brass wires, the effects of ultrasonic vibration on drawing force and surface quality of the wires were discussed.
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