板面底面上的美术设计 GRAPHICS
舱底货上面的垫板 relieving boards
板面底面上的 GRAPHICS
分别为上下底面积 Fo
底面上的刻划线 engraved line on base
对于水平直管段上底面及下底面各三个截面，测量了边界层内振荡流速的振幅分布及相位分布。
The velocity amplitude distributions of the oscillatory flow outside the boundary layer are measured at seven cross-sections along the horizontal, the vertical, and the bent sections respectively.
当把玻璃液倒在锡液上时，玻璃的底面也会变得完全平整。
When pouring molten glass onto the molten tin, the underside of the glass would also be perfectly flat.
事实上，底面渗漏现象随处可见，供水商也接受了每日每千米管道3500升的最低漏水量。
Indeed, background leakage is so pervasive that water suppliers accept 3, 500 litres of water per kilometre of pipe per day as the minimum achievable loss.
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