According to the calculating equations of the friction load on the rod string on the upstroke and downstroke, the friction load increases remarkably with the increa...是什么意思_According to the calculating equations of the friction load on the rod string on the upstroke and downstroke, the friction load increases remarkably with the increa...在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句