规格

平方

1.6

2.01

2 × 6.4

D

12.8

1.68

2.21

2 × 7

A

14

1.8

2.54

2.4 × 6

D

14.4

1.9

2.83

3 × 5

A

15

2

3.14

1.5 × 10

15

2.1

3.46

2 × 8

A

16

2.26

4.01

1.6 × 10

D

16

2.35

4.37

2.63 × 6.4

A

16.8

2.44

4.67

2.4 × 7

C

16.8

2.5

4.9

1.8 × 10

D

18

2.63

5.47

2 × 9

B

18

2.7

5.72

2.4 × 8

A

19.2

2.8

6.15

2.8 × 7

B

19.6

3

7.07

2 × 10

A

20

3.25

8.34

4 × 5

D

20

3.5

9.62

2.5 × 8

B

20

3.8

11.33

3 × 7

A

21

4

B

12.56

2.2 × 10

B

22

4.5

B

15.89

2.8 × 8

C

22.4

1.25 × 3

C

4.5

2.5 × 9

D

22.5

1.5 × 3

C

4.5

4 × 6

B

24

1 × 5

B

5

3 × 8

A

24

1.25 × 4

D

6

3.5 × 7

B

24.5

2 × 3

A

6

2.5 × 10

A

25

1 × 6

D

6

2 × 13

B

26

1.5 × 4

D

6

2.7 × 10

A

27

2 × 3.5

A

7

3 × 9

B

27

1 × 7

D

7

4 × 7

B

28

2 × 4

A

8

3.5 × 8

B

28

2 × 4.5

D

9

3 × 10

A

30

2 × 5

A

10

2.5 × 12

A

30

2 × 6

A

12

4 × 8

D

32

3 × 4

A

12

2 × 16

D

32

1.5 × 8

D

12

3.5 × 10

B

35