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QC/T 621-1999
Elastic hoop steel belt type
Nom
d max
d min
h max
h min
n max
n min
H max
H min
Φ7
7.2
6.8
0.63
0.57
6.25
5.75
8
6
Φ8
8.2
7.8
0.63
0.57
6.25
5.75
8
6
Ф8.5
8.7
8.3
0.63
0.57
8.25
7.75
8
6
Φ9
9.2
8.8
0.63
0.57
8.25
7.75
8
6
Φ9.5
9.7
9.3
0.83
0.77
8.25
7.75
8
6
Φ10
10.2
9.8
0.83
0.77
8.25
7.75
8
6
Ф10.5
10.8
10.2
0.83
0.77
8.25
7.75
8
6
Φ11
11.3
10.7
0.83
0.77
8.25
7.75
8
6
Ф11.5
11.8
11.2
0.83
0.77
8.25
7.75
8
6
Φ12
12.3
11.7
0.83
0.77
8.25
7.75
8
6
Φ12.5
12.8
12.2
0.83
0.77
8.25
7.75
8
6
Φ13
13.3
12.7
0.83
0.77
8.25
7.75
8
6
Ф13.5
13.8
13.2
0.83
0.77
8.25
7.75
8
6
Φ14
14.3
13.7
0.83
0.77
10.25
9.75
8
6
Ф14.5
14.8
14.2
0.83
0.77
10.25
9.75
8
6
Φ15
15.3
14.7
1.04
0.96
10.25
9.75
11
9
Ф15.5
15.8
15.2
1.04
0.96
10.25
9.75
11
9
Φ16
16.3
15.7
1.04
0.96
12.25
11.75
11
9
Ф16.5
16.8
16.2
1.04
0.96
12.25
11.75
11
9
Φ17
17.3
16.7
1.04
0.96
12.25
11.75
11
9
Ф17.5
17.8
17.2
1.04
0.96
12.25
11.75
11
9
Φ18
18.3
17.7
1.04
0.96
12.25
11.75
11
9
Ф18.5
18.8
18.2
1.04
0.96
12.25
11.75
11
9
Φ19
19.3
18.7
1.04
0.96
12.25
11.75
11
9
Ф19.5
19.8
19.2
1.04
0.96
12.25
11.75
11
9
Φ20
20.3
19.7
1.04
0.96
12.25
11.75
11
9
Ф20.5
20.8
20.2
1.04
0.96
12.25
11.75
11
9
Φ21
21.3
20.7
1.04
0.96
12.25
11.75
11
9
Φ23
23.3
22.7
1.25
1.15
12.25
11.75
11
9
Φ24
24.3
23.7
1.25
1.15
12.25
11.75
11
9
Φ25
25.3
24.7
1.25
1.15
12.25
11.75
11
9
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