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液压胀管是近二十年国外发展的新方法,经过研究实践,我们对液压胀管有了初步的认识,液压胀管比传统的机械胀管有很大的优越性,有推广的价值。
Hydraulic expansion is a new method of foreign development in the past 20 years. Through research and practice, we have got a preliminary understanding of hydraulic expansion. Hydraulic expansion has great advantages over traditional mechanical expansion and has the promotion value.