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Warning device for detecting of underground structures
Warning device for detecting of underground structures
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机译:地下结构检测报警装置
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摘要
This device is composed of a strip (1) of a material having a molecular orientation, so that its mechanical strength is very high in the longitudinal direction and lower in the transverse direction, and comprising at least one series of windows (2) are spaced apart and placed on a same line parallel to the longitudinal axis (3) of the strip.
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