With the increase of the tonnage and power of ocean-going ship, more and more attentions are paid to the match among vessel, main engine and propeller by shipping and shipbuilding world.
随着海洋运输船舶的吨位和功率不断增长，船舶推进系统中船机桨配合研究越来越受到世界造船业和航运业的重视，成为船舶科技领域的重要课题之一。
At present, the most replenishment ship is designed for large naval vessel, which require their tonnage and dimensions is also large.
目前，国内外综合补给船主要用于大型水面舰艇的航行补给，其自身的吨位、尺度都比较大。
The main drawback is that the very large tonnage of gas flow must be shifted from one vessel to the other.
主要缺点是大量的气流从一个容器流向另一个。
Shallow draught vessel of large tonnage is considered much more economical than conventional ships of same draught.
大吨位浅吃水船型有较佳的经济性。
Shallow draught vessel of large tonnage is considered much more economical than conventional ships of same draught.
大吨位浅吃水船型有较佳的经济性。
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