1. 鍍鋅鋼管DN50每米可以裝多少水DN65 DN80 DN100 DN125 DN150 DN200 每個規格分別每米可裝水多少
DN50指的是內徑50毫米。每米裝水0.00196立方米。回DN65, 0.00331立方米水答DN80,0.0050DN100,0.00785DN125,0.012DN150,0.0176DN200,0.0314