Tiếng Việt
ภาษาไทยFabric ducts can remain open and full even when there is no wind. In addition, this solution ensures minimal momentary tension when the system is started; Fabric ducts that flatten out when there's no wind are hard to start.
Standard single-suspended fabric ducts are closed and flat when there is no wind, which means that the air must be pushed through the entire duct when starting, which can easily lead to a large instantaneous tension and even sonic boom phenomenon
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