H13模具钢镦粗拔长数值模拟与工艺分析
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低频声波定向打击技术发展研究
ABSTRACTABSTRACTAbstract.KEY WORDS:low frequency acoustic wave,Regulation of acoustic wave propagation.non-fatal strike technology,Fluid strong sound source technology
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AbstractAbstractProtective relay is the one of devices to response the fault and abnormal of electricpower system to send out signals to trip CB.With the expansion of the power sys...
H公司STB8生产线优化设计
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Java技术,结合MySQL。本文主要论述了师生平台作业管理系统
ABSTRACTWith the development of Internet technology,which provides a new space in the worldof education,traditional education can no longer meet the needs of schools,teachers andst...












