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正洞超前导洞法
释义
正洞超前导洞法
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正洞超前导坑法
释
inner advance heading method
正洞超前导洞法
在隧道施工之前的正洞截面上的某个部位先行开挖一个断面较小的导洞以探明正洞前方地质情况,最后将导洞扩挖为隧道正洞的方法。
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plant beneficial elements
plant biology
plant biomarker
plant bioreactor
plant bioreactor technology
plant boring pest
plant boron deficiency symptom
plant boron nutrition
plant boron toxicity
Plant Breeding
plant breeding for disease resistance
plant cadmium toxicity
plant calcium deficiency symptom
plant cell biology
plant cell culture bioreactor
plant cell culture medium
plant cell embryogenesis
plant cell proliferation
plant cell totipotency
plant charcoal
plant chemistry diagnosis
plant chemotaxonomy
plant chlorine deficiency symptom
plant chlorine nutrition
plant chorology
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