但碲在富钻结壳、海底多金属结核、深海沉积物和陨石中的丰度异常高。
However, tellurium contents are extremely high in Co-rich crusts, Marine polymetallic nodules, deep-sea sediments and aerolites.
由于进行多金属结核与结壳研究测量样品的量较少，其中的放射性核素含量很低，所以要用低水平放射测量方法完成分析测量工作。
The measuring method of low level radioactivity were used because the sample is often very less and the radioactivity is frequently very low.
本发明公开了一种用大洋多金属结核-结壳浸出渣制备的混合水泥及其制备方法和其作为混凝土掺合料的应用。
The present invention discloses application of oceanic polymetallic nodule and crust leaching slag in preparing mixed cement and as material for concrete.
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