Equipment is called an equationofcondition in that it is true only for certain values of unknown quantities in it.
方程又称为条件等式，因为其中的未知量通常只允许取某些特定的值。
2
Based on the analysis of the equation and condition, the starting current velocity formula about the pill sediment is further proved.
通过该方程与水沙条件的分析，进一步验证了散粒体泥沙起动的流速公式。
3
ESJ is common in the modern radar jamming technology, this paper introduces a calculating method of radars detection area by using jamming equation on the conditionof ESJ.