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Without external force, the force arm and the cylinder is a negative angle state, the design can ensure that in practice, after the door is closed, the door closer can still provide the door with a sustained force to close the door, so that the door is always in a tightly closed state, the door needs to be mute, wind blowing and pressure has a very good application of the effect of the door.
Door closer plays an important role in fire prevention, the stable performance and high quality of the product can bring safety for people's life, in the accidental fire greatly reduce the loss of personal property.
Without external force, the force arm and the cylinder is a negative angle state, the design can ensure that in practice, after the door is closed, the door closer can still provide the door with a sustained force to close the door, so that the door is always in a tightly closed state, the door needs to be mute, wind blowing and pressure has a very good application of the effect of the door.
Door closer plays an important role in fire prevention, the stable performance and high quality of the product can bring safety for people's life, in the accidental fire greatly reduce the loss of personal property.
