minion
发表于 2025-3-25 03:18:50
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chemical-peel
发表于 2025-3-25 07:36:18
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hemorrhage
发表于 2025-3-25 14:03:52
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相同
发表于 2025-3-25 17:15:57
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竖琴
发表于 2025-3-25 20:18:02
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macular-edema
发表于 2025-3-26 01:10:38
Operational Hazards, Faults and Dykes; Frictional Ignition Involving Rock; Backfilling of Bord and Pillar Workings; Effect of Roof Falls on Pillar Strength; Recovering Roof Falls; Experimental Panels; Alternative Applications for Rock Bolts; and Mining in the Vicinity of Convergence Channels and Paleochannels.
Alveolar-Bone
发表于 2025-3-26 05:17:56
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一骂死割除
发表于 2025-3-26 10:27:52
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挥舞
发表于 2025-3-26 15:24:56
Excavation Mechanics,xcavations results in the formation of the second kind of building block, namely a pillar. The formation of many excavations and pillars requires consideration of a third type of building block, being the surrounding strata. This chapter presents the basic principles of how the rock mass responds to
Creatinine-Test
发表于 2025-3-26 19:45:55
Pillar Systems,e of pillar systems, often with catastrophic consequences. Examples and their underpinning causes are presented throughout the chapter. Most incidents reflect that pillar system design is deceptively complex, with behaviour and stability governed by both the regional environment, which determines th