Different from traditional direct burial laying method, utility tunnel is an advanced laying method.
与传统直接埋地的敷设方式相比，共同沟是一种先进的敷设方式。
Note: 1. The laying method in correspondence with D category in the table 1-18(GB/T16895.15-2002), which is suitable for the direct cable burying or cable layout in the underground conduit.
注：1。敷设方式对应于表1-18（GB/T16895.15-2002）中的D类，适用于电缆直接埋地或电缆敷设在地下的管道内。
For laying indoors , in tunnel, cable trench, or direct in ground, able to bear external mechanicalforces, but unable to bear large pulling force .
室内、隧道、电缆沟内，或埋地敷设等，能承受一定机械外力，但不能承受大的拉力。
For laying in doors, in tunnels, in cable trench or direct in ground, able to bear external mechanical forces, but unable to bear large pulling force.
室内、隧道、电缆沟内或埋地等能承受机械外力的场所，但不能承受大的拉力。
In the paper, a technological economic analysis is made as well to compare the twisting thermal insulated direct-buried pipes with underground tunnel laying ones.
文中还对热缠绕直埋保温管与地沟敷设保温管做了技术经济分析。
For laying indoor, in tunnel, cable French, well or direct in ground, able to bear external mechanical forces and certain pulling force.
室内、隧道、电缆沟内或直脉地下，能够承受一定的机械外力和一定的拉力。
Then it analyses the structure of industry environment and competitive advantage of Direct Mail magazine for laying theoretical basic of magazine industry value chain decomposition and integration.
接着对我国免费直投杂志产业价值链的概况进行初步阐述，并对其产业环境结构和竞争优势进行分析。
Then it analyses the structure of industry environment and competitive advantage of Direct Mail magazine for laying theoretical basic of magazine industry value chain decomposition and integration.
接着对我国免费直投杂志产业价值链的概况进行初步阐述，并对其产业环境结构和竞争优势进行分析。
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