Optimized Threshing Mechanism: Bigger double rollers, better threshing results and separation, additional re-threshing devices. Advanced Cleaning Mechanism：Fan and double fish shakers, more dependent, high cleanliness and lower loss. Cutter Swing Ring Transmission: Compact structure, move smoothly and little vibration. Improved Reel：Spring tooth，hydraulic control for laid crop. Capacious Grain Tank：1.3m3 of grain tank, dependent open and shut of gate and unloading conveniently. Main Specifications Model 4LD-2 Fed-in 2kg/s Prodrctivity 0.33-0.67hec/h Total Expense Wheat≤1.5% Rice≤3.0% Quality 1800kg Dimension(length× width× height) 6544× 2625 ×307 mm Width of Harvest 1900/2200/2360mm Matched Motor 50-86 Tractor