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.

youdao

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.

youdao