Tyres and wheels - tyres - agricultural tractor and machine tyres - specification for ply rating marked series tyres for log skidders - agricultural tractor and machine tyres specification for ply rating marked series tyres for logging and forestry service 轮胎和轮子.轮胎.农用拖拉机和农机轮胎.集材拖拉机用标明线网层额定值的系列轮胎规范