Many thanx for all of you! Community
of your forum is very kind and responsive.
Frenchy Pilou: tnax for you advices.
1)starting from sharp primitive may be userful in some cases, but if i have complex shape (power of zbrush in sculpting such difficult forms, low poly, no offence meant, is better to model not in Zbrush), and for my model, this method is not perfect.
2)The next way - to mask and flaten parts of model, i tried but it cant be used in my case (to sharpen edges and flaten surfaces) at all. 
3)Z2 brushes…pitch and else. Ok. If you paint with layer brush the stroke surface is great, and if you adjust it with pitch it becomes wery cool strait tech line. But! if you make pitch onto line painted with regular brush (and it is you every time need brush for model complex things) the result is poor
Conclusion: I must paint straight lines, is there a
ruler in sculpting mode?
Some way to connect two points on the surface with line, like in projection master mode (it modeling proces it is not wery userful, if model has complex shape).
Thanx to all! I will try to make something with proj master and ruler…it seems to be only way 
(not as fast and comfortable as i expect from Zbrush)