目的探讨地质勘探行业呼吸性粉尘危害程度分级技术标准的制订方法，为粉尘危害分级管理提供科学依据。
Objective to study the method to classify respirable dust harmfulness degree in geological exploration profession so as to provide scientific basis for its management.
目的探讨地质勘探行业呼吸性粉尘危害程度分级技术标准的制订方法，为粉尘危害分级管理提供科学依据。
Objective to study the method to classify respirable dust harmfulness degree in geological exploration profession so as to provide scientific basis for its management.
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