disaster-prevention function

power-stealing prevention function

’five-prevent’ function

Catastrophe preventing function

Disaster-prevention functions

disease preventive function

fouling-preventing function

preventive function

delta function (=δ-function)

function， function key

policy of prevention in the first place and integrating prevention with control

Analgesia function and anti-inflammation function

calibration function or curve [function]

characteristic function (= eigen-function)

characteristic function [of meromorphic function]

characteristic function and type-function

dual function of smarandache LCM function

exceptional function and shared function

function group， function grouping