| 单词 |
self-acting door |
| 释义 |
self-acting door self-acting door[′self ¦ak·tiŋ ′dȯr] (mining engineering) A ventilation door that is constructed of two halves which move on small pulleys and which are forced apart centrally as the trams come in contact with the converging beams that operate the door. |
| 随便看 |
- henry cort
- henry council for quality growth
- henry county
- henry county, al
- henry county, alabama
- henry county convention and visitors bureau
- henry county court house
- henry county, ga
- henry county genealogical services
- henry county, georgia
- henry county health center
- henry county high school
- henry county historical group
- henry county, ia
- henry county, il
- henry county, illinois
- henry county, in
- henry county, indiana
- henry county, iowa
- henry county, kentucky
- henry county, ky
- henry county, missouri
- henry county, mo
- henry county, oh
- henry county, ohio
|