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This depends not only on the quality of the individual, but also on the maintenance of the individual.
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It depends on the quality and the use of the degree of care.
Generally, it depends on the material and surface treatment, which can be up to 50 years. >>>More
Combination locks are mainly divided into mechanical password locks and electronic password locks, high, medium and low-end prices, domestic, imported are different, it is best to buy some brands that do more locally, so that after-sales can be more reassuring.
Anti-theft door buckle function: installed on the inside of the door, it can prevent the person who opens the door from being attacked outside the door. >>>More
The duration of the warranty varies from brand to brand. If you have a property management, you can find a property manager. The general security door is 3 to 5 years old. >>>More
The price of the security door is calculated according to the square The price of the fire door is calculated according to the square.