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milling asbestos fibres

May 02 2020 · In their study of Balangero workers Rubino et al estimated asbestos fibre concentrations to have averaged about 40 fml in the 1940s–1950s and to have decreased to 15–20 fml in the 1960s both in mining and milling areas apparently based on the same data we used for our estimates Rubino et al 1979 The main differences compared with our assessment were

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