02:57 00:44 Arch steel building machine.
Saving costs and labors
00:44 one machine produces 8 different shapes arch steel buildings
00:44 LS914-610 metal arch roof panels roll forming machine
00:45 screw joint metal arch roof panels roll forming machine
00:44 arch roof roll forming machine working flow
00:44 Long shun K arch Span roll forming machine working and testing
00:45 high quality with factory direct price