The standard pipe rack configuration for this drill consists of a long pipe cradle that is fastened to a pair of paral-lelogram- type swing arms.是什么意思_The standard pipe rack configuration for this drill consists of a long pipe cradle that is fastened to a pair of paral-lelogram- type swing arms.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句