... building apparatus.Building and furnishingRound, square of unconventional type steel pipe used for stairs, railing, handrail, scaffold, cargo ... , exhibition case and flower stand.Automobile and motorcycle:Steel pipe used for dissipative muffler, exhaust stack, dashpot, ... apparatus.Building and furnishingRound, square of unconventional type steel pipe used for stairs, railing, handrail, scaffold, cargo ...