A hydraulic door closer would be the best choice for a door that is used by children, because it has an adjustable speed that allows you to chose how fast or slow you want the door to close, thus giving adequate time to remove little fingers and hands.
No it does not have a hydraulic pump, oil is forced through an adjustable aperture, it is the rate at which the oil flows through this hole that has a direct affect on the doors closing speed.
no
yes
I think it is because hydraulic systems are stronger than pneumatic systems. if you know that is wrong then get an expert. : )
Dune buggies have no doors... They are legal. I would assume that if your jeep came with no doors, it would be legal.
Sliding doors are not considered safe when you have young children. Children can fall into them and get cut should it break and also with opening and closing they could get fingers caught in the slide. Its best if you have small children to block your sliding door.
The bombs are hooked on with electrically operated latching hooks. In some aircraft individually triggered, in some all together. The bomb bay doors operate just like undercarriage doors with a hydraulic ram. When the bay doors are open, bomblatches can be triggerred and bombs will fall.
if you made doors for a motorbike, where would you attach them?
Since composite doors are cheaper than solid wood doors, it seems that the main reason that one would choose to install composite doors over another type would be to save money.
One would buy security doors to protect their home from invadors. They would also buy security doors to add an additional layer of security to their home.
Your state of mind may be always on security of children. The children in this dream might represent the dreamer's work or creative endeavors. Perhaps the dreamer feels that his/her efforts are not recognized, that is, they are hidden. Those doors might also be symbolic of circumstances that prevent the creativity from appearing openly, or they might symbolize "doors of opportunity" that have never opened for the dreamer.
It depends how small the children are, if they are under a foot and a half then it is illegal.