counter-wedge
counterweight
counter-wheel
counting-down
counting-rate
country
couple
coupled
coupled-cavity
coupler
  coupling
course
course-and-speed
course-keeping
course-of-value
course-setting
courter
coutersunk-head
covalence
covalency
covalent

    coupling resistance

     резистивная связь

     реостатная связь

     связь через сопротивление