On the afferent gill arterial trunk are the round protruding structures which may serve as a branchial heart of the blood blebs and may concern with the material exchange of the gill .

入鳃动脉 主干上具有膨大的圆形隆起，可能起类似血泡的鳃心作用，尚与鳃部本身的物质 交换有关；

LAN Emulation in ATM Trunk + Exchange Ethernet Technology

ATM 主干+ 交换式以太网组网技术中的局域网仿真

On the basis of analysis and comparison on techniques of trunk exchange route mainframe system software and safety of network platform for Zhejiang forestry digital information propositions were made for the selection .

对浙江省数字林业信息化网络平台架构中的 主干技术、 交换技术、路由技术、主机技术、系统软件和安全技术，进行了分析比较，提出了具体的技术选型和建议。

As the connection of national highways provincial highways and trunk highways the county level highways have linked the rural and urban in means of material exchange economic exchange technical exchange and cultural exchange etc .

县乡公路连接着国道、省道、 干线公路，是沟通城乡物资、经济、技术及文化 交流的桥梁和纽带。

This paper introduces the trunk organization creation and deleting of incoming route and outgoing route for S12 J family digital program control exchange .

介绍S12－J型数字程控 交换机 的 中继组织、来话局向和去话局向的创建、删除等。