27点差分格式
27-point difference sheme
变压器三点差动保护
tri-poim style differential protection of transformer
差点丧命
within an inch of one’s life
成对4点差分格式
coupled 4-point difference scheme
粗差点定位
Gross error point positioning
单元最大结点差
maximum difference of the node number in a element
点对点差分信号
Point-to-Point Differential Signal
交点差调整法
adjust method of intersection error
九点差分格式
nine-point differencing scheme
9-point difference scheme