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本文针对１６２０×１４ｍｍ输水管道工程中管道现场组对及无损检测要求，研制了１６２０液压千斤顶胀式管道内对口器。该对口器实际应用效果良好，为大口径管道现场组对提供了较为先进的施工机具
This article aimed at 1620 × 14mm pipeline project in the field of pipelines and non-destructive testing requirements, developed 1620 hydraulic jacking expander pipe counterparts. The paraphernalia practical application of good results for the large-diameter pipeline site group provides a more advanced construction equipment