(1) Ensure that the tractor is always working in a good technical condition. (2) Ensure the complete and reliable working parts of the tractor. In particular, the exhaust pipe should be installed, because the exhaust pipe is mostly equipped with a silencer, which will reduce a large part of the noise. (3) Prevent the loosening of parts and components, loose parts will produce vibration. (4) Do a good job of tractor maintenance inspection. According to regulations, qualified lubricants and greases shall be added to prevent poor lubrication of relative moving parts and dry friction or semi-dry friction, which will increase noise. Dried Brown Smooth Shiitake Mushroom Dry Shitake,Soaking Dried Shiitake Mushrooms,Rehydrating Shiitake,Dried Sliced Shiitake Mushrooms SHANDONG JOIN & SHARE AGRICULTURAL DEVELOPMENT CO., LTD , https://www.joinsharemushroom.com