1. The air filter must be installed firmly to avoid cracking of the weld due to vibration during operation. 2. When installing the sealing washers, be careful to lay it flat and do not install it in a twisted state. 3, foam filter is made of soft polyurethane foam, in use and maintenance is strictly prohibited from contact with gasoline and fire roasted, so as not to melt or catch fire. If the filter is broken, it should be replaced with a new piece of the same material. Dust bags are rubber products. Replace them if they are broken. Ketone Test,Urine Rapid Test Strips,Animal Test Strip,Test Strips Diabetes Weight Loss Changchun Medicon Technology Development Co., Ltd , https://www.teststrip.pl