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2013-05-23 12:21
求翻译:The laser guidance system has been developed specifically for use with microtunnelling systems. This system includes a laser source, located in the thrusting pit and pre-aligned accurately with the course of pipeline. This laser beam passes through the product pipe and hits to a target system. This target (an electroni是什么意思? 待解决
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The laser guidance system has been developed specifically for use with microtunnelling systems. This system includes a laser source, located in the thrusting pit and pre-aligned accurately with the course of pipeline. This laser beam passes through the product pipe and hits to a target system. This target (an electroni
问题补充: |
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