您要查找的是不是：
- 管pipe
- 霍尔兹管Holtz tube
- 管的vasal
- 网管network management
- 管路pipeline
- Element-by-elementelement-by-element
- 单词element含有五类不同的字符。The word'element'contains five different types of character.
- 品管QA
- 高管senior executive
- 弯管syphon
- 排气管vent-pipe
- 风管wind pipe
- 管件pipe fittings
- 配管tubing
- 热管thermotube
- 信管fuse
- 盘管pipe coil
- 小管tubule
- 管口nozzle
- 管径caliber
