Two theatre owners in Philadelphia, John S Clarke and William Wheatley, purchased the Philadelphia rights from Benjamin Webster, owner of the Adelphi Theatre in London. So far all was probably legal. But Clarke and Wheatley did not produce the original play. Instead they pirated the Jefferson/...
Matthew Clarkea* - 《Critical Studies in Education》 被引量: 51发表: 2012年 7. Citizenship Education: A Critical Look at a Contested Field Summary This chapter contains sections titled: Models of Development and Education—The Challenges Contested Citizenship Status and Identity Citizensh... LR Sh...
伺服进给 第1篇 数控铣床的伺服进给单元是铣床的重要组成部分, 它的进给传动是由伺服电机经过进给传动系统将动力传递给工作台等运动部件, 机械传动部件的设计好坏对进给伺服单元的伺服性能影响很大。在设计过程中, 常常由于在设计阶段机械传动部件没有得到足够的重视, 结果使位置调节难度增加, 所以对数控铣床的纵向伺服...