๐”– Bobbio Scriptorium
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Rapid development of coalmine bolting in China

โœ Scribed by Zhang Nong; Wang Cheng; Zhao Yi-ming

Book ID
116846848
Publisher
Elsevier
Year
2009
Weight
321 KB
Volume
1
Category
Article
ISSN
1878-5220

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## Abstract Sera from 2421 coalminers, representing all the radiological categories of pneumoconiosis, and from 260 healthy blood donors, as controls, were examined for antinuclear factor and rheumatoid factor. Antinuclear factors were present in 21.5% of sera from the controls and in 23.1% from th