cast iron manhole cover with frame

同义词释义

1)cast iron manhole cover with frame,铸铁人孔座及盖板2)cast iron manhole cover,铸铁人孔盖板3)cast iron cover base,铸铁盖座4)cast iron flat,铸铁盖板5)manhole cover ring,人孔盖座6)cast iron cover of well,铸铁井盖板