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It's very easy, it's good to find a manufacturer to change 10 cm shorter, if it's not a door made by a local manufacturer, find a local anti-theft door manufacturer to help change it, and pay a little money.
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There is no best of both worlds ... I suggest you should go to the cave.
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Change the door directly, where to buy and where to change!
Width 92 cm? Then you can install a 900 security door. Some manufacturers are in stock. The height of 2050mm*900mm is also a standard. Go to the security gate market.
OK. Yes, really.
The level of the security door is different, and the price is different.
Your security door should be very old, 45cm is difficult to find this kind of lock cylinder now.
It is normal for the security door to be 3cm higher than the floor tiles on the outside, because the security door will be a little higher when he has a door side threshold, and under normal circumstances, 3cm is within the normal range of high school.