a line of small holes for tearing at a particular place
a hole made in something;
"a perforation of the eardrum"
the act of punching a hole (especially a row of holes as for ease of separation)
This prevents bowel perforation.
The acute Perforation has developed.
Excessive pressure can lead to perforation of the stomach wall.
simple perforation 单穿孔
central perforation 中央性穿孔,中央穿孔...
multiple perforation 复穿孔
perforation plate 穿孔底板
corneal perforation [医] 角膜穿破...
explosive perforation 爆炸打孔
reticulate perforation 网状穿孔
marginal perforation 边缘穿孔
negative perforation 底片片孔
enteric perforation 小肠穿孔
stomach perforation 胃穿孔
perforation rate 穿孔速度,穿孔速率...
esophageal perforation 食管穿孔