该传感器具有灵敏度和检测效率高、非接触检测和结构简单等主要特点，可广泛应用于各种工业管道、海洋平台结构、杆件、钢丝绳等构件的裂纹、腐蚀或者断丝等缺陷的检测。

The transducer has characteristics of good sensitivity, global and long range inspection, no coupled required, capable of operating with a substantial gap to the material surface and simple structure.

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TJ-18型地面加料机其挑杆回转运动与上下摆动运动采用了液压传动，设备重量轻，结构紧凑、动作灵敏、操作方便。

Rotating and up-down swinging of the ram for TJ-18 groundcharger are hydraulically driven, which can reduce the weight of equipment, make structure contact and be convenient to operate.

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本文推导了分段线性材料桁架结构的位移对截面积的灵敏度，并给出三杆桁架实例。

The present paper gives the derivation of the displacement sensitivity of truss structures made of piece wise linear material, with respect to the cross sectional areas of bars.

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