pre-load; precompression; pilot pressure
battlefield; battleground
protection from smoke; anti-smoke
escape valve; release valve; relief valve
loss of equilibrium; vertigo
not straightforward; not dealt with by ordinary means
commercial supremacy; commercial rights
floating body; floating structure
inertial navigation system
polymerization; polymerisation
air route; airway; air lane; air corridor
to pilfer; to steal a portion
low pressure; low voltage