疵点的英文：
defect; fault; flaw

参考例句：

Cracks can be detected by a method using ultrasonic waves
疵点可用超声波方法检测。

A mole is a blemish on a person's skin.
黑痣在人的皮肤上是一个疵点。

Rubber--Recommendations for the workmanship of pipe joint rings--Description and classification of imperfections
GB/T17604-1998橡胶管道接口用密封圈制造质量的建议疵点分类与类别

defect是什么意思：
n. 缺点，过失，缺陷
v. 叛变，脱离，背叛，投敌

The defect in the drainage must be remedied.
这排水系统的缺陷该设法补救。

The individual was somewhat of a small defect.
个别的难免有点小瑕疵。

Congenital defects,blindness,etc
先天性缺陷、失明等.

fault是什么意思：
n. 缺点；毛病；故障；过错；发球失误；断层
v. 挑剔；弄错；产生断层

Justifying a fault doubles it
护短是加倍的错误

Every man has some fault.
人孰无过。

The mineralization is localized by faulting and shearing
矿化受断层和剪切带的控制。

flaw是什么意思：
n. 裂缝；缺点；瑕疵
v. 使破裂，（使）有缺陷

The absence of flaw in beauty is itself a flaw. ——Havelock Ellis
无缺陷的十全十美本身便是缺陷。——埃利斯

Tackling these two flaws will be painful.
解决这两个问题是很痛苦的。

A tiny flaw in a piece of white jade.
白玉微瑕。