How to calculate the area of the security door?

It's the threshold. The threshold depends on whether you open the door inside or outside, in short, find the level height of the door outside and indoors, from the bottom of the threshold to the indoor level is the inner height, from the bottom of the threshold to the level outside the door is the outer high, and then leave a little more centimeters of high on the line. >>>More

This kind of general logistics company is used. Ann logistics fee calculation. Unless the merchant offers free shipping.

1. Wipe the façade frequently with a soft cloth to keep it clean and prevent the erosion of corrosive substances. 2. Regularly add a little lubricating grease to the mechanical rotating (transmission) parts such as door hinges, lock tongues, and lock latches to keep them lubricated, so as to make the door and locks open and close flexibly. 3. It is strictly forbidden to insert chores or inject various oils into the lock heart. >>>More

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There are screws on both sides of the door sleeve that can be removed after they are removed.