有效增值系数有效增值因数有效倍增因数有效放大系数有效增殖系数有效增殖因数
Effective value-added coefficient, effective value-added factor, effective multiplication factor, effective amplification factor, effective proliferation coefficient, effective proliferation factor
以上为机器翻译结果，长、整句建议使用 人工翻译 。