吨级船舶 meaning in English

tonner

Up to 15000dwt mechanical lauching facility
吨级船舶机械下水设备
Analyzing the tugboats " number and horsepower marshaling mode in tianjin port , based on the development of throughout in 2005 ( which may be 140 millions ton ) and the requirement of 150 , 000 - ton - shipping putting in and leaving the port ; 2 . how to organize the marshaling structure of tugboat - fleet to adjust the requirement in 2010 , when the throughout of tianjin port will come to 200 millions ton ; 3 . studying the change of the tugboat utilization ratio and the influence of the whole layout of tugboat - fleet , in accordance with the change which shipping putting in or leaving the port will be random and need n ' t concrete operation , along with widening the port - lane and allowing the two - way shipping
同时对天津港的吞吐量发展及大型船舶进出港的趋势进行了分析，并把拖轮营运与港口生产的发展结合起来，对下述问题进行具体分析： 1 、结合天津港2005年吞吐量的发展( 1 . 4亿吨)以及15万吨级船舶进出天津港的需求，分析对港口拖轮的数量和马力配置； 2 、拖轮船队的结构如何适应2010年天津港吞吐量将达2亿吨的要求； 3 、随着天津港航道的不断拓宽，双向航行将被允许，进出港船舶可随时而无须集中进行。