pipe accessories造句

• Graphical symbols for piping systems-piping accessories
  管路系统的图形符号管件
• Graphical symbols for piping systems-axonometric representation of graphical symbols for piping, piping accessories and valves etc
  管路系统的图形符号管路管件和阀门等图形符号的轴测图画法
• Jinwei valve is a professional enterprise that busy in production and deal in all kinds of valve and pipe accessories, also is a lead company that integrate the research, development, manufacture and service
  经纬阀门是专业化生产和经营各类，阀门及管道配件，实体性公司，集科研、开发、制造成套，服务经营于一体的经纬企业。