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What is the size of the provisions of football?

Star2010-01-17 01:56:32 +0000 #1

Xia Ying yarn2010-01-17 02:11:24 +0000 #2
5 Soccer is the official match ball volume of the provisions of 615.8 cubic centimeters.
FY football2010-01-17 02:40:50 +0000 #3
football game ball with leather or other suitable materials.

Sphere the circumference of not more than 70 cm (28 inches), not less than 68 cm (27 inches). The weight of the ball, the game began to open

shall not be more than 450 grams (16 ounces), not less than 410 grams (14 ounces). Ball pressure, at sea level

surface is from 0.6 to 1.1 atmospheric pressure (per cm ^ = 600 grams to 1100 grams per square inch from 8.5 to 15.6 pounds).

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