词汇	echo weighting
释义	echo weighting 回波加权
随便看	equal partnership equal parts Equal parts circumference geometrical Equal patterns equal pay equal-pay equal pay act equal pay for equal work equal pay for equal work? equal pay for work of equal value equal payment for equal work equal-payment series equal-payment series compound amount factor equal payment series present worthcomputation equal-payment series present worth factor equal payment series sinking fundcomputation equal-pays Equal percentage equal percentage characteristic equal percentage flow characteristic equal-percentage valve equal performance of labor equal permeating resistance method equal personality equal phase