61.   Police said manhole covers blew out and sections of the street caved in along six blocks.

62.   Rhein Fire, for example, drew media attention across the country by advertising on manhole covers.

63.   Some owners cement their manhole covers when making renovations or extensions.

64.   Then protesters welded shut the manhole cover.

65.   They realized that its babies were trapped in the storm sewer and tried to lift the manhole cover.

66.   They removed garbage cans and post boxes and battened down manhole covers along his route.

67.   Underground gas explosions blew off at least three manhole covers and forced officials to close city streets for several hours.

68.   In fact, he had placed the case on a manhole cover, before returning via the sewers to find it crammed with false banknotes.

69.   In fact, he had placed the empty case on a manhole cover, before returning via the sewers to find it crammed with false banknotes.

70.   The Tokyo metropolitan police tightened inspection on automobiles, while officers were seen turning over manhole covers and searching any suspicious objects found underground.