We provide filling and maintenance of fire extinguishers, installation of traffic equipment and other services.
我们提供充装和维修灭火器、安装交通器材等服务。
Principle and design keys of a flange type filling valve have been introduced with methods of installation and use as well as issues deserved notice.
介绍了法兰连接式充液阀的原理和设计要点，并介绍了安装使用的方法及应注意的问题。
The design and installation of fixed Lenth filament wound sand- filling FRP pipe in Shishi city' s diversion Engineering and the final effects are introduced in this paper.
介绍了定长缠绕玻璃夹砂管在石狮引水工程中的设计与安装，以及所取得的效果。
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