So today you'll find up to 482 indentations on average ball surface, a sleek, aerodynamic shell of polyurethane elastomers combining flexibility with a tremendous resistance to abrasion and that created casing is wrapped around a masters tournament of ingredients like zinc oxide used as a filler and polybutadiene, a polymer that's basically rubber with memory, allowing the material to revert to its original shape in 1/1000 of a second, say after getting whacked by a club.
是以,今天你會發現球的平均表面有多達482個壓痕,一個光滑的、符合空氣動力學的聚氨酯彈性體外殼,結合了靈活性和巨大的抗磨損性,並且創造的外殼被包裹在一個大師賽的成分中,如用作填料的氧化鋅和聚丁二烯,一種基本上是有記憶的橡膠的聚合物,允許材料在1/1000秒內恢復到其原始形狀,例如在被球杆擊打後。