It should be realised that ovalisation of the 22mm outer diameter pipes was minimal and difficult to measure.

显然，22毫米外径管的成椭圆形是最小的且难以测量。

After dividing into subcostal artery, the outer diameter of 67 percent of subcostal artery was bigger than that of inferior abdomen arteries.

发出肋缘动脉后67％的肋缘动脉比腹壁下动脉本干粗。