如何保证发动机冷却系水垢的清洗质量

Safety requirement of bus seat fabric and etc

为了从根本上解决发动机冷却系结垢问题，研制了两种不同的酸洗溶液，阐述了配制方法，指出了清洗过程中需要引起注意的问题。

Detailedly expatiates the harmful materials maybe existed harmfulness,the basic safety technical requirements of textile and in the bus seats fabric and its leather products of China.the retardancy requirements of automobile interior materials,the added content.