Effective improvement measures are presented through experimental research in important parameters affecting the operation of model DZ60KS vibratory pile hammer on vibratory pile driver/extractor.是什么意思_Effective improvement measures are presented through experimental research in important parameters affecting the operation of model DZ60KS vibratory pile hammer on vibratory pile driver/extractor.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句