采掘系统规划、设计与安全.pdf 约5.8MB（压缩后以实际为准），该资料所属行业范围建筑建设。
简要：the excavation safety and shoring and industry has been promoted, innovated, and influenced by many talented individuals; a few of these people I have had the privilege to know. Th……
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采掘系统规划、设计与安全.pdf 约5.8MB（压缩后以实际为准），该资料所属行业范围建筑建设。
简要：the excavation safety and shoring and industry has been promoted, innovated, and influenced by many talented individuals; a few of these people I have had the privilege to know. Th……
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