研究证明，聚氨酯缓蚀添加剂能明显降低内膛烧蚀与磨损，大幅度提高枪管寿命。
It has been proved that polyurethane wear-reducing additive can apparently reduce wear and erosion of the gun barrel and improve the life of the barrel a great deal.
研究证明，聚氨酯缓蚀添加剂能明显降低内膛烧蚀与磨损，大幅度提高枪管寿命。
It has been proved that polyurethane wear-reducing additive can apparently reduce wear and erosion of the gun barrel and improve the life of the barrel a great deal.
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