Minimum piece length can be no shorter than 33yds.(30mts),Max piece length can be 66 yds.(60mts),tolerance is 50-70m;or 132 yds.(120mts),tolerance is 110-130m.

• 尺寸都要大过30米；最长的尺寸可以是60米；这时的允许误差是50-70米;最长的尺寸也可以是120米；这时的允许误差是110-130米.