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250-5
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1.
The
electron
backscattering
factor
was
measured
from
24
different
elements
at
low
primary
beam
energy
(
250-5
,
000
eV
)
.
电子
散射
因子
测定
了
来自
24
个
不同
元素
在
低
初级
束
能量
（
250-5,000
电子伏特
）
。
diàn zǐ
sǎn shè
yīn zǐ
cè dìng
le
lái zì
èr shí sì
gè
bù tóng
yuán sù
zài
dī
chū jí
shù
néng liàng
(
èr bǎi wǔ shí gàng wǔ , líng líng líng
diàn zǐ fú tè
)
。
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