| 1. | Well , that one there comes directly from the main line on 1 25th
好的，那根直接通向125号大街的主管道 |
| 2. | Model 07 - s should be installed at the fire sprinkler service connection to the main line
型号07 - s应该安装在连接到主管道的消防喷淋系统处。 |
| 3. | Two or more smaller size valves can be piped in parallel ( when approved ) to serve a large supply pipe main
两个以上的小通径阀门可以以并联方式（经过批准）安装，以服务于较大口径的供应主管道。 |
| 4. | Gaskets for gas supply - part 6 : gasket materials based on synthetic fibres , graphite or polytetrafluoroethylen for gas valves , gas appliances and gas mains
供气用密封垫.第6部分:气阀煤气设备和煤气主管道用 |
| 5. | Being the main channel of diathesis education , multimedia teaching can made the teaching effect most exerted in the limited time
摘要多媒体教学是实现素质教育的主管道，多媒体教学能使课堂教学效果在有限时间得到最大发挥。 |
| 6. | Series a includes steam service for warming up before the main line is opened , and for balancing pressure where the lines are of limited volume
系列a包括用于在主管道开启前进行加温的蒸汽应用场合，或在流量有限的管道上平衡压力。 |
| 7. | Installed at the residential fire sprinkler service connection to the main , series 07s dual check backflow preventers protect the water supply against polluted water being siphoned back from the sprinkler system
安装在住宅消防喷淋头与主管道连接处，系列07s双止回防回流阀保护水供应系统不会受到从喷淋系统中虹吸回来的污染水的污染。 |
| 8. | Where approved by code , watts recommends a custom engineered watts pvs series water supply valve station consisting of two or more 719 series valves piped in parallel to serve a larger supply main
在符合有关规定的地方，美国瓦茨建议常规设计美国瓦茨pvs系列水供应阀门站，这种总成由两个以上的719系列阀门通过管道并联而成，用于更大的供应主管道。 |
| 9. | Fire protection system installations : the national fire protection agency ( nfpa ) guidelines require a confirming flow test be conducted by a certified tester whenever a " main line " valve is installed , such as a shut - off valve or a backflow preventer
消防系统安装：美国全国消防局（ nfpa ）指导方针要求在安装“主管道”阀门时要由有资格证书的检验员对关闭阀或防回流阀进行流量检测。 |
| 10. | ( 4 ) thermal pipelines are important parts of concentrated heat supply of the thermoelectricity combination . according to the thermal lube service prospect , the paper calculates thickness of the buried steam pipe , proposes a new opinion of the interface temperature controlling method , and also attempt to determine the resistance loss of the minimal steam tubes and wrote its program
( 4 )热力管网是热电联产集中供热系统的重要组成部分，本文根据热力管道的发展趋势，对直埋蒸汽管道的保温层厚度计算，提出采用界面温度控制法的见解，并进行编程计算，此外，还对直埋蒸汽主管道阻力损失进行编程计算的尝试。 |
