The final drives are double reduction with spur gear and unitary sprocket, which are sealed by floating oil seal for easy service.
两级直齿轮减速，浮动油封密封，整体链轮。
The main expressions of the wane of contemporary drama literature are the subject matter is unitary and the content is superficial.
当代戏剧文学衰微的主要表现有题材单一，内容浅薄
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