  The paper gives a screw axiomatics of rational mechanics, namely:
  1. introduces the main measures of mechanics: the mass measure, the scalar
and (vector) screw measures of motion, the (vector) screw measure of impressed
action, the increment velocity of the vector measure of motion, the (vector)
screw measure of constraint action;
  2. postulates the (stronger) local integral form of conservation law for the
vector measuare of motion (fundamental principle of dynamics), and
  3. defines the central concept of rational mechanics {mechanical system being
realized in the form of all classical mechanical systems (mass-points, rigid
bodies, continua, point-bodies, etc.).
  The presentation is based on new notions of vector calculus -- homogeneous
and inhomogeneous vector and tensor slider-functions and screw measures.
