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4520-01-360-6553 4520013606553 013606553 is a shaped product of sheet metal; round, rectangular, or square in cross-sectional shape. it is uniform throughout its length. used to conduct air or gas fumes from one area to another.

5445-12-360-6553 5445123606553 123606553 is an item the shape of which is essentially that of a flat disk or rectangle and the thickness of which is small in proportion to either its length or breadth. it has a centrally located hole or depression to or in which may be welded a pipe dowel which may include bolt holes. it is used as an individual base for one of the supporting legs of a tower.

5445-21-798-9327 5445217989327 217989327 is an item the shape of which is essentially that of a flat disk or rectangle and the thickness of which is small in proportion to either its length or breadth. it has a centrally located hole or depression to or in which may be welded a pipe dowel which may include bolt holes. it is used as an individual base for one of the supporting legs of a tower.

5445-01-365-7041 5445013657041 013657041 is an item the shape of which is essentially that of a flat disk or rectangle and the thickness of which is small in proportion to either its length or breadth. it has a centrally located hole or depression to or in which may be welded a pipe dowel which may include bolt holes. it is used as an individual base for one of the supporting legs of a tower.

5445-01-422-1914 5445014221914 014221914 is an item the shape of which is essentially that of a flat disk or rectangle and the thickness of which is small in proportion to either its length or breadth. it has a centrally located hole or depression to or in which may be welded a pipe dowel which may include bolt holes. it is used as an individual base for one of the supporting legs of a tower.