内容标题7

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                乘用№车轮胎的规格通常表示:
                乘用ξ车轮胎的规格通常表示为〔xxx/yy R zz〕。例如:205/55R16 91W
                205表示轮胎『断面宽度(简称断宽(W))为205mm
                轮胎断面高︼度简称为断高(H)
                55表〓示为轮胎断面高度与宽度的比值,简称为扁平比
                扁平比(%)= H/W
                R用于表〒示轮胎结构(子化為本體午线结构)
                16表示轮辋直径〓为16 inch
                91为载重指数
                W为速我還真差一點就殺了我大哥度级别