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Professional roll forming culvert duct machine

When making a decision on throat size, keep in mind that selections with an aspect ratio of 3:1 or less will perform the best. aspect ratio is the ratio of the throat length to the throat width. example: a gi or gr 30" x 42" has an aspect ratio of 1.4:1 – well below 3:1.

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Professional roll forming culvert duct machine exporter from China, we are one of the most skilled supplier from USA with ISO9001 Certification. Also the items have been certified by mutiple security certification.We are going to offer you our Professional roll forming culvert duct machine priducts in top-quality and most favourable price.


We are an enterprise that export Professional roll forming culvert duct machine to China, we are approved by the relevant state registratio. Primary Professional roll forming culvert duct machine and sell to different regions in China, product out there upon request. We've got the spirit of "customer initial, honesty first" principle, using a quantity of enterprises established long-term cooperative connection.

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