词组短语
manhole cover[口]井盖;升降口盖;圆盘状平的东西
权威例句
Manhole
Manhole
Manhole cover
PIPE TO MANHOLE SEAL
Manhole assembly with water barrier
MANHOLE CLOSURE ASSEMBLY WITH VALVE RELIEF MEANS
Treatment suits manhole rehabilitation.
Interpretation of telephone system manhole drawings
Interpretation of telephone system manhole drawings
Design & analysis of the pressure vessel manhole nozzle metallic flangeguard as per ASME SEC VIII Div. 1, Edition 2010