Abstract In adopting API method, the kinetic model of a multistage pumping rod system was simplified into mul tiple lumped masses connected in series by springs.是什么意思_Abstract In adopting API method, the kinetic model of a multistage pumping rod system was simplified into mul tiple lumped masses connected in series by springs.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句