For the present China's small-sized horizontalengines with single-cylinder are mostly used on walking tractors, small type harvester, and small portable irrigation equipment, etc.
目前我国小型单缸卧式发动机多用于手扶拖拉机、小型收割机、小型移动式排灌装置等。
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In trunk-piston engines, a horizontal pin within the piston is encircled by the upper end of the connecting rod. This by far the most common construction.