Hello, We are Qingdao Ruichang Plastic Machinery Factory: 
 We supply prestressed plastic spiral pipe production line, Prestressed plastic corrugated pipe production line, pre-stressed flat plastic pipe production line, bridges, prestressed plastic corrugated pipe production line, there are two: one is a bamboo-type was spiral, the main product features: compact structure, convenient operation. Tel 0532-83275820, fax 0532-87270629.