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แค่เรื่องลูกกอล์ฟ ก็มีกฎเป็นหน้าๆแล้วครับ
ลอกจาก R&A มาให้ดูครับ 
Weight
The ball must not weigh more than 1.620 ounces avoirdupois (45.93gm).
This is one of the simpler tests, as all that is required is an accurate set of scales.
There is no minimum weight thus a ball can be as light as the manufacturer desires.
Size
The ball must have a diameter of not less than 1.680 inches (42.67mm).
It is important to note that there is no maximum size, the ball can be as large as desired provided it conforms to all other standards.
Spherical Symmetry
The intent of this Rule is simply to ensure that a ball is manufactured and designed to behave symmetrically.
Initial Velocity
There is a formal test procedure carried out using equipment approved by The R&A to check that golf balls meet the Initial Velocity specification. The intent of the Rule is to limit the speed of the ball off the clubface. Full details of the test specification are available on The R&As website.
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Lion_Stones  
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| เขียนเมื่อ |
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19 มี.ค. 55 15:10:18
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