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Question:

How much is the telescopic ratio of the electric door?

How much is the telescopic ratio of the electric door?

Answer:

Most of the retractable door on the market stretching is 1 meter telescopic to 5 meters, the longer the longer the longer the material, the same extension of the longer the door the greater the interval between the door, the higher the visibility of the door, China Heng Albert's retractable door is also 1 meter telescopic to 5 meters.
Generally between 4.2 to 7.6, the more the cheaper the door telescopic than the larger, the less the material, remember this on the line, the best retractable door brand is ---- Red Gate Technology! You can go to their website to see, there are phone calls across the country!
Under normal circumstances is: the total length of the door × 0.18 +040 is the length of the shrink, 0.4 is the length of the nose. Except for special section doors.

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