首页> 外国专利> Improvement in the treatment process of the bristle loaded with tin salts, in order to keep its qualities of resistance, having been the subject of u.s. pat. no. 347.689 of 5, 1904

Improvement in the treatment process of the bristle loaded with tin salts, in order to keep its qualities of resistance, having been the subject of u.s. pat. no. 347.689 of 5, 1904

机译:为了保持其抗性,改进了装有锡盐的刷毛的处理工艺是美国的主题。拍。没有。 1347年5月347.689

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