摘要
自从加工业在大约20年前引入变速驱动器以来，它们的应用就开始变得十分广泛，现在仍然有许多工艺过程受益于把设备升级至变速运行。
Whilst their uptake by the process industries in the 20 or so years since variable speed drives were introduced has been widespread, there are still many processes that would benefit from an upgrade to variable speed operation.
出处
《经济导报（化工技术）》
2007年第1期23-23,25-29,共6页
Chemical Processing Technology
