... stationery and medical apparatus:Rouond, square or rectangle pipe used for desk, chair teapoy, electronic piano, various kinds ... apparatus.Building and furnishingRound, square of unconventional type steel pipe used for stairs, railing, handrail, scaffold, cargo racks, ... .Building and furnishingRound, square of unconventional type steel pipe used for stairs, railing, handrail, scaffold, cargo racks, ...