发布时间:2025-02-08 21:00:07
肯定是铬钼钢的材料好了. 铝合金的除了轻没设么优点,一 价格贵 二 焊缝质量低 三 五通管螺纹和头管的硬度差 四 整车震动太大... 铬钼钢除了重都比铝合金强(做自行车用的材料) 而高碳钢纯属现代为了省钱而衍生出来的次等车料.
骑感好的是铬钼钢制的、要轻的是铝制的,冲击吸收性最好的是碳纤
回答完毕.
120平毛坯装修多少钱,不包家具与电器,(打算贴地板砖,格局是三房二厅) 房子地址在 湖北荆州
2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07请问专家欲将100平方面积的厂房室内温度一年四季保持在40摄氏度左右用什么材料和加热方法经济有效
2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07 2025-02-08 21:00:07