Scientific and Reasonable Drive Devices: 4LS matched with four-wheel tractors and additional diesel engine of 17-24-horse power to ensure efficient power and invariable rotate speed. Compact Integration Frame: Grain tank on the top of the cab to ensure impartiality of gravity and unloading conveniently. Optimized Threshing Mechanism: Threshing roller combined with rasp bar and rigid pole tooth to gain good separation. Advanced Cleaning Mechanism：Optimized double fish shaker, dependent end shaker angle and lower loss.Cutter Swing Ring Transmission: Compact structure, move smoothly and little vibration Main Specification Model 4LS-1 Fed-in kg/s Prodrctivity 0.2-0.47hec/h Total Expense Wheat≤1.5% Rice≤3% Quality 1300kg Dimension(length× width× height) 5380×1860 ×2340 mm Width of Harvest 1300-1750mm Matched Motor 17－22 Tractor (with) 17-24 Diesel Engine