盐膏层
盐膏层
白皙的脸颊染上薄薄的红润,在床脚明珠润泽的光芒中,竟似剔透得宛若清波,不见一丝粗糙。
Liquid-solid exterior circulating fluidized bed heat exchanger can be used to evaporate and concentrate the extract of single-base powder when withdrawing nitrocellulose from it.液固外循环流化床换热器可以用来蒸发浓缩单基药提取硝化棉的提取液。