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.
The definition of a flail is a farm tool that is a long-handled stick that is swung to thresh grain. An example of a flail is a tool used to toss grain up in the air. To flail is defined as to wave or swing about wildly or to flounder. When you wave your arms around wildly, this is an example of flail.