The relationship between the tonnage and area of inland vessels is needed to calculate the average lockage tonnage reasonably.
探讨内河运输船舶的吨位与面积之间的关系，将有助于合理有效地计算船闸的一次过闸平均吨位。
The relationship between the tonnage and area of inland vessels is needed to calculate the average lockage tonnage reasonably.
探讨内河运输船舶的吨位与面积之间的关系，将有助于合理有效地计算船闸的一次过闸平均吨位。
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