请输入您要查询的英文单词:
单词
exposure factor
释义
exposure factor
exposure factor
[
ik′spō·zhər ‚fak·tər
]
(nucleonics)
A quantity
f
used to specify radiographic exposure equal to
st
/
d
2
, where
s
is the intensity of radioactive source,
t
is the time, and
d
is the source to film distance.
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更新时间:2025/3/19 14:47:06