1794 Excavating and foundation work
1611 Highway and street construction
1622 Bridge, tunnel, & elevated highway
1623 Water, sewer, and utility lines
1629 Heavy construction, n.e.c.
1794 Excavating and foundation work
1795 Wrecking and demolition work
1796 Installing building equipment, n.e.c.
1799 Special trade contractors, n.e.c.
7819 Services allied to motion pictures
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