free composition meaning in English
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Examples
- To solve the problem of pollution of asbestos brake shoes , a kind of asbestos - free composition fiber reinforced brake shoes for drilling rigs is developed
为解决石棉刹车块对环境的污染和变温摩擦系数不稳定的问题，中国新星石油公司第六普查勘探大队研制了无石棉复合纤维增强石油钻机刹车块。