目的探讨产前羊水指数（AFI）和无负荷试验（NST）联合测定对预测围产儿预后的价值。
Objective To detect the value of combination of AFI and NST in prediction the prognosis of perinatal fetus.
方法联合应用胎心无负荷试验（NST）及多普勒脐动脉血流速度测定对2 0 0例妊娠晚期孕妇进行观察。
Methods fetal non-stress test combined with fetal umbilical artery doppler velocimetry were used in 200 late pregnant women.
利用四球试验机考察了其在液体石蜡中的最大无卡咬负荷值。
The tribological behaviors of the synthetic benzotriazole derivatives as additives in liquid paraffin were evaluated with a four-ball machine.
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