The HS-57 reduces the hours required to repair manhole covers to minutes. Heavy-duty hydraulic motor with hydraulic-powered breakout 60 carbide-tipped pics cut through concrete, asphalt and brick ...
It was sitting under another concrete slab. The other site, next to Bath Street, contained a flat steel slab, about six inches square, and part of a cast iron manhole cover. It was buried about 1 ...