1. g / cm3 that unit volume weight （total density） T that special
　　2. Density range T112-32-44
　　112-9-25 expressed as fine wool first-class products second-class goods
　　3. Density range T122-24-38
　　122-24-30 Semi-shag first-class second-class goods
　　4. Density range T132-24-36 said shag first-class second-class goods
　　5. Order， the need to prompt， specifications， models and numbers can be
　　6. At the same time provide drawings and picture details
　　7. Felt cartridge， filter， felt parts， oil seals， gaskets， felt blocks， felt general felt to provide samples.
　　8. Description of tolerances
　　★ density of 0.30g / cm3 above
　　Thickness of 1.5-2.5mm positive and negative deviation of 20% first-class products
　　Positive and negative deviation of 27% second-class goods
　　Thickness of 2.6-25mm positive and negative deviation of 11% -14% first-class goods
　　Positive and negative deviation of 15% -17% second-class goods
　　★ density of 0.30g / cm3c the following
　　Thickness of 1.5-2.5mm positive and negative deviation of 25% first-class goods
　　Positive and negative deviation of 30% second-class goods
　　Thickness of 2.6-25mm positive and negative deviation of 11% -18% first-class goods
　　Positive and negative deviation of 15% -25% second-class goods
　　9. According to the need to express free sulfuric acid content
　　10. The above implementation standards according to the People's Republic of China textile industry