hollow bar meaning in Hindi

Examples

1. GF Piping Systems supplies piping systems made of plastics and metal as well as solid and hollow bar stock for machining.
2. Cutting of the metal is done by hand held cutters, often foot long hollow bars with tool steel shaped / sharpened files attached.
3. The technique involves the insertion of relatively slender reinforcing elements into the slope  often general purpose sacrificial drill bit and by pumping grout down the hollow bar as drilling progresses.