The new drive mechanism for the double knife cutter bar of selfpropel Combine harvester with rubber crawlers have been development.
研究设计了往复式切割器新型驱动装置，用于全喂入稻麦联合收割机双动刀切割器。
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An engine that obtains the oxygen needed from the atmosphere, used especially to propel aircraft and distinguished from rocket engines having self-contained fuel-oxidizer systems.