神马品牌网是一部内容开放、自由的互动网络百科全书客观、专业、权威的知识性百科全书
来源:百度文库 编辑:神马品牌网 时间:2024/10/05 20:12:01
The relative space will become larger when the rubber is thick, but the ralative space will become smaller when the rubber is thin.