Aircraft engineers have for years sought to replace metal components with lightweight plastics reinforced with carbon fibres.

飞机工程师们多年来探索使用轻质强化碳纤维塑料代替金属部件。

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Transmission or conveyor belts or belting, of textile material, whether or not impregnated, coated, covered or laminated with plastics, or reinforced with metal or other material.

纺织材料制的传动带或输送带及带料，不论是否用塑料浸渍、涂布、包覆或压层，也不论是否用金属或其他材料加强。

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