constant-depth
constant-displacement
constant-envelope
constant-flow
constant-gain
constant-geometry
constant-hazard
constant-head
constant-interval
constant-lead
  constant-level
constant-load
constantly
constant-mass
constant-mesh
constant-pitch
constant-potential
constant-power
constant-pressure
constant-shear
constant-speed

    constant-level chart

    карта постоянных эшелонов