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Objective to study the epidemiological characteristics of pneumoconiosis and so as to provide scientific bases for establishing control and preventive countermeasures of pneumoconiosis.
目的探讨尘肺病的流行病学特征，为尘肺病的防治对策提供科学依据。
Discusses the basic theory, implementation steps of attribute connection by spatial position, and puts up with the countermeasures for the quality control and check of the spatial data.
探讨了空间位置的属性连接方法的理论基础与实施步骤，并提出了空间数据的质量控制与检查的对策。
There are four major countermeasures for risks as follows: risk avoidance, damage control, risk retention, risk transfer.
主要风险对策有风险回避、损失控制、风险自留、风险转移四种。
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