وهم يفعلون ذلك من أجل تحديد حجم بعضهم البعض. A PEREZ OF THE BACK OF THE RUG DETERMINES ITS LENGTH WITHOUT TRACTION ON A SMOOTH SURFACE, AND ACTS SIMILARLY FOR OTHER PEREZS AND MEASURE THE OVERALL LENGTH, MEASURING THE TOTAL NUMBER OF PEREZS WITH A ACCURACY OF 10 MG OF WEIGHT AND LENGTHS OF THE PEREZS WITH 10-METER LENGTH OF THE WEIGHT AND LENGTH OF THE PEREZS CAREFULLY MEASURED BY THE LENGTH OF THE WEIGHT AND LENGTH OF THE W=4M IN THE SYSTEM