K2Cr2O7H2SO4回流消解法
K 2Cr 2O 7 H 2SO 4 reflux digestion
背风回流降水
lee reversal precipitation
被动平衡回流损失
passive balance return loss
闭射口不回流风洞
close jet nonreturn flow tunnel
变回流比调节
variable reflux ratio regulation
并流回热器
parallel flow regenerator
部分回流
part reflux
partial reflux
soybean wastewater treatment