assist
...in the operation

continuous
continuous operation

cycle
cycle of operation

direct
to direct an operation

generator
generator operation

give back
the operation gave him back his sight

hazard
you're hazarding the whole operation

holding
holding operation

incomplete
incomplete operation

intermittent
intermittent operation

linear
linear operation

manual
manual operation

mechanical
mechanical operation

multiplying
multiplying operation

noiseless
noiseless operation

normal
normal operation

op.
operation

operation
the operation of thinking

quiet
quiet operation

rescue
rescue operation

salvage
salvage operation

shock
shock following a surgical operation

stable
stable operation

stone
to undergo an operation for stone

transformer
transformer operation

undergo
to undergo an operation