- 行业: Fire safety
- Number of terms: 98780
- Number of blossaries: 0
- Company Profile:
Established in 1896, NFPA's mission is to reduce the worldwide burden of fire and other hazards on the quality of life by providing and advocating consensus codes and standards, research, training, and education.
A diagram consisting of a set of symbols and connecting lines that shows a step-by-step progression through a procedure or system.
Industry:Fire safety
A diagram that shows, by means of single lines and graphic symbols, the course of an electric circuit or system of circuits and the component devices or parts used in the circuit or system.
Industry:Fire safety
A diameter for noncircular cross sections that is determined by 4(A/p), where Ais the cross-sectional area normal to the longitudinal axis of the space and pis the perimeter of the cross section.
Industry:Fire safety
A differential in the line of drive between any two axles.
Industry:Fire safety
A digital electronic system designed for use in an industrial environment that uses a programmable memory for the internal storage of user-oriented instructions for implementing specific functions to control, through digital or analog inputs and outputs, various types of machines or processes.
Industry:Fire safety
A dike with a cover intended to minimize the entrance of precipitation into the diked area.
Industry:Fire safety
A dimensionally defined plane parallel to the basic plane that is measured from the top of the applicable headform or the basic plane.
Industry:Fire safety
A dimensionless factor relating pressure drop in a straight duct to velocity and wetted surface area.
Industry:Fire safety
A diode used to block reverse flow of current into a photovoltaic source circuit.
Industry:Fire safety
A direct injection proportioning system that utilizes flowmeters for foam concentrate and water in conjunction with a variable output foam pump control system.
Industry:Fire safety
