hydraulic machinery短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 液压水力机械 For many years, hydraulic engineers have conducted a great deal of research work and some progress on mechanism and harnessing of abrasion of hydraulic machinery has been achieved. 多年来，不少水利工程技术人员对此进行了大量的研究工作，从磨蚀机理的研究到磨蚀的治理均取得了一定的进展。 cnki