Para.

I

II

III

IV

V

VI

VII

VIII

S≥

0.95 - 1.00

0.90 - 0.95

0.85 - 0.90

0.80 - 0.85

0.70 - 0.80

0.60 - 0.70

0.50 - 0.60

<0.5

P/%

95 - 105

90 - 110

80 - 120

75 - 125

70 - 130

60 - 140

50 - 150

0-¥

a<

0.05

0.10

0.15

0.20

0.30

0.40

0.50

>0.50

Quality

best

better

good

fine

moderate

common

defective

inferior