n.紧缩；收缩；约束

Results There were two shapes in the lumen of pharyngoesophagus.One was smooth, the other was striction. 结果咽食管段内腔可以分为平滑型和紧缩型两种形态,且内腔宽度在不同年龄组之间比较差异有显著性。

The work principle and the characteristics of Magnetic striction leveler were introduced. Analysis andcomparison with relative instrument was given. 介绍磁致伸缩液位计的工作原理、特性,并和相应的仪表作分析和比较。

Firewall technology brings data security and re- striction of believable communication at the same time. IP address permeate could create a secure channel through the firewall. 防火墙技术在带来数据安全的同时却限制了可信的数据通信,IP地址穿越可以在防火墙上开辟一条可信通道。

Orebodies show as vein, and have phenomenons as dilatation, striction, offset and recombination along the direction of strike and tilt with a continuous mineralization. 矿体呈脉状,沿走向、倾向具膨胀、收缩、分支、复合现象,矿化较连续。

Conclusion: The therapy effect of PRM was superior to postural striction, and all patients should be treated by PRM when the diagnosis of posterior semicircular canal BPPV was uncle. 结论：PRM治疗效果明显优于体位限制治疗，凡后半规管BPPV诊断明确者均应给予PRM治疗。