unit circumference

Setting wheel circumference, clock and metric of British unit.

设置轮子周长, 时钟,公制或英制.

Unit head circumference maximum and mean blood flow velocities per minute of fetal middle cerebral artery were changed little during the normal second trimester.

每分钟单位头围大脑中动脉的最大速度及平均速度在中孕期间变化小。

Unit head circumference maximum and mean blood flow velocities per minute of all fetus with hyperdynamic circulation were higher than reference ranges, the increase in the latter was higher than that in the former ( P < 0.05).

所有高动力循环状态胎儿每分钟单位头围大脑中动脉的最大速度及平均速度均高于正常高限，平均速度与正常高限的比值大于最大速度与正常高限的比值（P

Setting wheel circumference, selection of metric or British unit.

设置车轮周长, 选择公制或英制.