Methods Puncture was operated and tube was placed in former cornu of ventricles of brain.
方法床边锥颅侧脑室前角穿刺置管，复达欣灌注，结合腰穿脑脊液。
2
The tracheid and sieve tube elements are all differentiated from the procambia in the center of the haustoria, and the former occurs prior to the latter.
吸器中管胞和筛管都是从吸器中央具有原形成层特性的细胞分化的，管胞的分化先于筛管，或同时进行。
3
After adopting this technique, the production period of tube plate for low-pressure heater can at least shorten half comparing with the former, meanwhile the cost can at least decrease two thirds.