Reduced Friction and Excellent Anti-Wear Performance of QBe2 Beryllium Bronze against 38CrMoAlA Steel in Pneumatic Downhole Motor under Grease Lubrication

To improve the service life of the newly designed pneumatic downhole motor, a kind of commercially crystal beaded candle holder available lithium complex grease was used to help avoid the rapid wear-induced failure of the dynamic seal of pneumatic downhole tools in operation.The investigation on the tribological behaviors of QBe2 beryllium bronze a

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ARSIS AND THESIS: A REVIEW OF TWO ELEMENTS OF RHYTHM IN NON-TRADITIONAL MUSIC WRITTEN BY F. H. SMITH VAN WAESBERGHE D.J

This paper aims to discuss the comparative terms of arsis and thesis in the study of Western music.The purpose of the study is to study the forms of music from the terms of language and its application, because there are many elements of music that are not understandable.Method of this study uses classical literature and musicology approach in whic

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