Definition of shrewd operator:
°A
device designed to
allow breathing when it would otherwise be hindered, as by a medical condition or the presence of poisonous vapors.
"The house painters were each officially required to wear a respirator, but this was sometimes disregarded in the extreme heat."
Definition of shrewd operator:
°A
device designed to
allow breathing when it would otherwise be hindered, as by a medical condition or the presence of poisonous vapors.
"The house painters were each officially required to wear a respirator, but this was sometimes disregarded in the extreme heat."