The epidermis of ephedra herbs was broken by crashing roll so as to raise the extraction rate of ephedrine by more than ten times.The liquid from sprinkling extraction was clear.

• 麻黄碱盐类存于麻黄草草心，用双辊碾压机将麻黄草表皮碾破，可使浸取速率提高十倍以上，通过喷淋浸取获得澄清的浸取液。