The the performance parameters of wheel on concrete road was highest, followed by earth road and farm field.
不同的路面，轮胎的附着性能不同，水泥路面最好，土路面次之，休闲地最差。
2
Here we report the performance of British Large White on Rizhao Pig Breeding Farm in Shandong Province, which improved the British Large White in Sep. 1999.