||
中国新标准 ( 粗糙度 )Ra |
美国标准 (微米 ),Ra |
美国标准 ( 微英寸 ),Ra | |
▽ 4 |
6.3 |
8.00 |
320 |
6.30 |
250 | ||
▽ 5 |
3.2 |
5.00 |
200 |
4.00 |
160 | ||
3.20 |
125 | ||
▽ 6 |
1.6 |
2.50 |
100 |
2.00 |
80 | ||
1.60 |
63 | ||
▽ 7 |
0.8 |
1.25 |
50 |
1.00 |
40 | ||
0.80 |
32 | ||
▽ 8 |
0.4 |
0.63 |
25 |
0.50 |
20 | ||
0.40 |
16 | ||
|
|
|
|
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