“marginal grade”的概念、定义、翻译、参考文献-科学参考

单词	marginal grade
释义	marginal grade Encyclopedia 工学〔矿产工业指标〕释 cut-off grade；marginal grade边界品位在圈定矿体时，对单个矿样中有用组分含量的最低要求，以作为区分矿石和围岩的界限品位。是固体矿产工业矿体圈定时的一项品质指标。
随便看	fission product chain; fission product decay chain fission product chemistry fission product decay chain fission products fission reaction fission reactor fission reactor chemistry fission reactor material fission recoil fission rocket fission saddle point fission-spectrum neutron fission threshold fission track fission track age fission track anneal fission track constraints on uplift and denudation Fission-Track Dating fission track dating fission track Dpar data fission track geological thermal history modelling fission track length fission track thermochronology fission yield fissiparism

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