Você procurou por: ducting (Inglês - Chinês (simplificado))

removal and replacement of obsolete cabling and ducting
拆卸和更换陈旧电缆和管道

cooling of the stack gas or modifications to the ducting may be needed to keep sorbent requirements at acceptable levels;
烟气冷却或烟道改造是保证吸收剂始终达到要求的必要做法。

an obsolete hot-air ducting heating system and kitchen exhaust system cannot be maintained and present a potential fire hazard.
热空气取暖系统和厨房抽气系统过时，无法维护，有引发火灾的危险。

:: installation of services (electrical, plumbing) and ducting for communications networks, information technology networks, security installations, and so forth
* 安装事务（电力、水暖管道铺设）和通信网络、信息技术网络、安保设施的缆线管道铺设等

service improvement year two of a two-year construction plan for a consolidated mission headquarters in khartoum, including electrical and plumbing installation work; ducting of communications and information technology (it) networks, security installations; installation of security systems for compliance with minimum operating security standards; installation of perimeter wall and area lighting for entire complex; sign-posting of the mission complex; and testing and commissioning of installations
喀土穆特派团联合总部两年期建造计划的第二年，其中包括安装电力和水暖设备以及铺设通讯网络、信息技术网络和安保设施；安装符合最低运作安保标准的安保系统；为整个建筑群建造周边围墙和周边照明系统；树立特派团建筑群的标志杆；对整个特派团建筑群进行测试并投入使用