The blind ram has no space for pipe and is instead blanked off in order to be able to close over a well that does not contain a drillstring.是什么意思_The blind ram has no space for pipe and is instead blanked off in order to be able to close over a well that does not contain a drillstring.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句