The standard pipe rack configuration for this drill consists of a long pipe cradle that is fastened to a pair of parallelogram- type swing arms.
本钻机的标准管架配置由一个长管道托架组成，该托架被固定在两个平行四边形的旋臂上。
Config.ru, found in the root of each Rails 3 application, is a so-called rackup file, or a configuration for a Rack-based application.
存在于每个Rails3应用程序的根目录下，即所谓的rackup文件，也就是基于rack的应用程序的配置文件。
Config.ru, found in the root of each Rails 3 application, is a so-called rackup file, or a configuration for a Rack-based application.
存在于每个Rails3应用程序的根目录下，即所谓的rackup文件，也就是基于rack的应用程序的配置文件。
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