英语语法分析

These devices take the form of frangible disks or pressure relief valves.

减压装置以易碎盘或减压阀的形式出现。

The cover (36) is attached to the ring (38) initially by frangible bridges (42) so that the ring acts as a second tamper proof band.

喷嘴盖（36）起始时被易断桥（42） 连接到环（38），使该环作为第二擅开防止带。

At last we propose a half frangible watermark algorithm based on the theory of digital signature, which can authenticate the integrity of image.

最后本文还借用数字签名思想提出了一种基于半易损水印的实用的数字图像认证算法。