نتایج جستجو برای: quarry

تعداد نتایج: 1614  

Journal: :Journal of the Franklin Institute 1926

Journal: :EPJ Web of Conferences 2017

Journal: :Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 2014

Journal: :Journal of the American Ceramic Society 1922

Journal: :E3S web of conferences 2021

More than 50-60% of minerals in Russia and the CIS countries are mined an open-pit or mining quarry, as it is most economical productive. JSC "CC Kuzbassrazrezugol" ranks second terms total coal production among regions Russian Federation first Kuzbass. Quarry dump trucks main mode technological transport when transporting rock. An important task facing road to reduce cost transported products....

2015
Susannah Catherine Rose Maidment Charlotte Brassey Paul Michael Barrett Andrew A. Farke

Although Stegosaurus is one of the most iconic dinosaurs, well-preserved fossils are rare and as a consequence there is still much that remains unknown about the taxon. A new, exceptionally complete individual affords the opportunity to describe the anatomy of Stegosaurus in detail for the first time in over a century, and enables additional comparisons with other stegosaurian dinosaurs. The ne...

Journal: :Journal of occupational health 2005
Makoto Futatsuka Masahiro Shono Hisataka Sakakibara Pham Quoc Quan

Few studies have focused on the health effects of vibrating tools on workers in the tropical area. Work conditions and health effects related to rock drill operation were studied in 102 quarry workers, including 73 rock drill operators in Vietnam. We aimed to clarify (1) risk of vibration exposure, (2) occurrence of vibration-induced white finger (VWF), and (3) characteristics of hand-arm vibra...

Journal: :Industrial health 2008
Ernst E Ferg Peter Loyson Gabriela Gromer

Fine particle quartz is considered as a lung carcinogen and therefore its monitoring in the workplace is currently required by government legislation across the world. In order to enforce the health and safety standards, techniques that can accurately determine the amounts airborne quartz are necessary. Currently, two techniques dominate quartz analysis--the infrared (IR) spectrophotometric ana...

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