main line of defense (resistance)

main defense area (line) / main defensive position

island of resistance / pocket of resistance

resistance, to break (down) resistance

main zone (of resistance)

outline the main line of defense (of the enemy)

main defense (line) area

deployment line; line of deployment (LD); line of departure

main tank/ main fuel tank

main gear box / main rotor transmission

main rotor transmission / main gear box

main-rotor head / main-rotor hub

main-rotor hub / main-rotor head

main defense forces

main defense zone (defence)

main zone of defense

main fighting line

main line of advance

main battle line

air resistance

chemical resistance

countermeasure resistance

crush resistance

frictional resistance

resistance forces

resistance movement

make / offer/ provide/ put up resistance

soften resistance

disrupt resistance

corrosion resistance

weather resistance tire

vibration resistance

engraving resistance