ESFR system materials tend to cost more than control mode systems (larger pipe sizes, more expensive sprinkler heads). Also, in most cases an ESFR system will require the installation of a fire pump, which is not always required for a control mode system. sprinkler systems are not required.
Definition of flay. 1 : to strip off the skin or surface of : skin The hunter flayed the rabbit and prepared it for cooking. 2 : to criticize harshly : excoriate He was flayed by the media for his controversial comments.
Definition of flail. transitive verb. 1a : to strike with or as if with a flail The bird's wings flailed the water.b : to move, swing, or beat as if wielding a flail flailing a club to drive away the insects. 2 : to thresh (grain) with a flail. intransitive verb.