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45A1
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1.
R(D)
-
45A1
the
surface
Rockwell
hardness
is
a
light
load
Rockwell
hardness
test
equipment
.
45A1
型
表面
洛
氏
硬度
计
是
一种
轻
负荷
洛
氏
硬度
试验
仪器
。
sì wǔ A yī
xíng
biǎo miàn
luò
shì
yìng dù
jì
shì
yī zhǒng
qīng
fù hè
luò
shì
yìng dù
shì yàn
yí qì
。
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