long-term excessively exposed
... end magnetic field 端部磁场 long-term excessively exposed 长期过量接触 electromagnetic farce tests 吸力试验 ...
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目的进一步了解长期过量接触工业性氟对工人骨密度影响的程度。
Objective Further study of the worker's skeleton density from long-term excessively exposed to industrial fluorine.
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