2. Pipes and ducts for electricity, water and waste are threaded through each floor module while it is still in the factory. 每个楼层模块仍在工厂里的时候,电力、水和废弃物的管道将他们接通。
3. Please fit the ventilation ducts. 请装上通风管道。
4. Most office buildings have dozens of air ducts and vents. 多数办公楼都有许多的管道和通风口。
5. Calcium deposits (calcifications) in ducts and other tissues. 腺管或其它组织中的钙沉积(钙化)。