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QDD-2N spring applied air release brake for safe operation
QDD-2N spring applied air release brake for safe operation
QDD-2N spring applied air release brake is controlled by springs. So when spring quantity more, then this brake's braking force is larger, too.

According to QDD-N spring applied air release brake clamping disc thickness, this brake can be divided into QDD-2N and QDD-3N. They are used to clamp steel disc thickness is 12.7mm and 30mm in separately.
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