骑缝章的英文：
a seal on the perforation

seal是什么意思：
n. 海豹；图案，印章；封印；保证，誓约；标志，象征
v. 保证；密封；确定；盖章；密封

A stamp or seal meant to be impressed.
图章用来盖戳的图章或印章

The experience seals their friendship.
这一经历确定了他们的友谊。

Sealing is prohibited in many countries.
许多国家禁止捕海豹。

The probe unit is hermetically sealed.
探头装置是密封的。

It was stored in a tube with a break seal.
它保存在一个有断裂密封垫的试管里。

perforation是什么意思：
n. 穿孔,贯穿,贯通

single-perforated grain
单孔药柱

This machine perforates the sheets of stamps.
这台机器在这整版邮票上面穿孔。

The broken ribs perforated into his lung.
折断的肋骨刺穿了他的肺。

The samples are collected in perforated polyethylene bags
样品采集在有孔的聚乙稀袋中。

One patient suffered a bowel perforation.
一位病人患了肠穿孔。