satellites, for example, on sunday china launched the long march 2d launch vehicle, launching an earth remote sensing satellite into space. the rocket took off at 9:58 a.m. beijing time from the seichang satellite launch centerellite yaagan 39 into a given orbit. and by the way, this was the 50th anniversary flight of the long march series rockets. it turns out that a new window into space has been opened, well, you can call it the events from this news window. now let's not talk about windows, let's talk about doors, interior doors, let's learn how to choose them correctly. beautiful, but most importantly reliable. today we will tell you what you should pay attention to when choosing an entrance door. let's start with the material. the most popular design is metal; steel is most often used. the main disadvantage of steel doors is accelerated wear of the hinges due to load. the thickness of the metal will already reach 2 mm, so, this affects its own, of course, peace of mind, so, so, and of course the anti-burglary class. anti-burglary can still be, uh, effective due to quantity locks the fittings used to install the locks are also very important when choosing. so. there is some functionality that is install