<正> 拖拉机发动的散热,一般是靠皮带直接传动,使风扇旋转散热。这种散热方式的弊病,是发动机需要散热时(如发动机超负荷工作转速......

Purpose:To investigate the therapeutic effect and indicatio n of silicone oil tamponade combined with lensectomy preserv......

...