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51mm

51mm

51mm

51mm

1

On the pivots , 51mm from mid-support plate there is a mark of scribed line which is as index of the height pouring water or glycerin .

在枢轴上距中承板 51 毫米处有刻线标记，作为在测定时指标注水或甘油的高度。

2

In 1969 a (51mm) bituminous concrete overlay was placed on the concrete deck .

1969年在混凝土板上铺设了 51mm 厚的沥青混凝土铺装层。

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