- Example: If the tide contemplated tide tables (ie compared with the number "0 Customs Goods") for such customs, the room is 3.9m rules about the number "0 continent" would be:
3.9m - 1.9M = 2.0
- Number "0 Ruler Water" and the number "0 station" (Figure 1)
Figure 1: Diagram indicates the tide height, depth and height of the dikes.
h0 - the height of the dike Sea than the average sea level.
H1 - height of the tide than "0 water meter"
h2 - height of the tide than "0 Hai Toys"
z0 - The gap between the average sea level and "0 Hai Toys"
H1, H2 - The depth of the sea
α - Difference between "0 station" than the "0 Hai Furniture"
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