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 two-handed variant saw use in a limited number of conflicts during the European Middle Ages. The two-handed flail is a hand weapon derived from the agricultural tool of the same name, commonly used in threshing. Only a limited amount of historical evidence exists for their employment in Europe during this era.