In general it is OK, but I can not agree with sentence:

Men who have a height of 160-190 cm and weight 60-100 kg are recommended for short turns of the ski, 165 cm in length, for medium, as well as large turns, 170-175 cm.

It is too general approach. 165cm in length is mainly used in slalom skis. So if we talk about racing skis, for long turns length of skis should be higher - in example I am 187cm tall and I have GS skis of 183cm and they are too short for me - they should be about 190cm.
On the other hand, as you wrote in your article, there are more classes of skis than only racing ones. As you named it "universal" I suppose you thought about All Mountain skis. This is a very nice group of skis designed to ski in different conditions - from icy and well prepared slopes up to loose and wet unprepared ones after snowfall and several hours of skiing... All Mountain skis are longer than these designed for slalom - they may have about 175cm and are very flexible in terms of radius of the turns - you may ski with very tight short turns or with long and ones at high speed.

To describe each type of skis a short article is not appropriate approach. I think you should focus on one type of skis in one article to make it right.