press span 中文意思是什麼
press span
解釋
壓板紙-
This dissertation investigates the influences of internal press and missiles shape on deformation and rupture of a multi - span thin - walled metal tube that struck by a large - mass and slow - speed missile transversely. 103 impact tests were conducted on a thin tube ( d / t = 44 ) either empty or filled with water using a missile ( dm / t = 6 ) with various nose shapes ( flat - nosed, hemisphere - nosed and conical - nosed )
採用三種彈體（平頭、半球形和圓錐頭，彈體直徑與管壁厚度之比d _ m t = 6 ）對空管和高壓充水薄壁鋼管（徑厚比d t = 44 ）進行了沖擊破壞實驗，預加工作內壓分別為0mpa ， 5mpa ， 10mpa和15mpa 。
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