1) artificial change ballast
![点击朗读](/dictall/images/read.gif)
人工换碴
2) replacing sleeper and ballast with man-machine cooperation
![点击朗读](/dictall/images/read.gif)
人机配合换枕碴
3) replacement for ballast
![点击朗读](/dictall/images/read.gif)
换碴
1.
Construction technique of replacement for ballast on the Guangzhou-Maoming railway line;
![点击朗读](/dictall/images/read.gif)
广州-茂名铁路换碴施工技术
4) ballast replacement
![点击朗读](/dictall/images/read.gif)
道碴更换
5) engineering spoil
![点击朗读](/dictall/images/read.gif)
工程弃碴
6) debris loading means
![点击朗读](/dictall/images/read.gif)
装碴工具
补充资料:人工受精与人工授精
人工受精与人工授精
artificial fertilization and artificial insemination
我国学者把“人工受精”与“人工授精”两名词区别开来:前者指人工体外受精而言,后者指把精液注入到妇女的阴道或宫颈管、宫腔内,使精、卵在体内相遇。人卵体外受精与胚胎移植后出生的婴儿俗称试管婴儿。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条