Additionally, a valve system has a valve connector including a portion of a first passageway with the valve connector further including a suction port and an introductionport that are spaced apart.
此外，阀门系统具有包括一部分第一通道的阀门连接器，而阀门连接器还包括间隔开的抽吸口和导入口。
2
The first chapter makes the introduction of the definition of Marine (vessel) traffic security and introduces the condition of Dalian port.
第一章对水域船舶交通安全管理作了概念性的介绍，并介绍了大连港水域的物理情况。
3
Firstly, as an introduction, Thesis analyze the background, current situation and blueprint of construction port information system, also bring forward the goal and meaning of this research.