三、我们实践中所见我国近年来对一些“惰性”粉尘和“良性”尘肺进行了调查研究,如电焊工尘肺。过去认为焊尘多为氧化铁,认为是“良性”尘肺。对炭黑、石墨、云母、水泥都做了系统研究,国家也承认了这些粉尘所引起的尘肺为法定尘肺,广大工人得到了党的关怀。 Third, we have seen in practice that some “inert” dusts and “benign” pneumoconiosis have been investigated in recent years in our country, such as electrician pneumoconiosis. In the past that welding dust and more iron oxide, that is “benign” pneumoconiosis. Carbon black, graphite, mica, cement have done a systematic study, the state also admitted that these dust caused by pneumoconiosis is a statutory pneumoconiosis, the majority of workers have been the care of the party.