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polytropy n.【化學】多變性。

polytypic

Due to the complexity of occurrence condition and the polytropy of influencing factors , the excavation and supporting in soft failure roadway under high ground stress become very difficult 摘要高地應力破碎軟巖巷道,由于賦存條件的復雜性和影響因素的多變性,使得該類巷道的開挖與支護極為困難。