垫片
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气门间隙调整垫片的作用是什么？
周涛 2021-04-21 09:48 发动机在冷态下，当气门处于关闭状态时，气门与传动件之间的间隙称为气门间隙。间隙过大：进、排气门开启迟后，缩短了进排气时间，降低了气门的开启高度，改变了正常的配气相位，使发动机[详细]
2023-03-06 07:43 分类：问答Is it OK to allow users to query an OLTP SQL Server database with excel?
I have a SQL Server 2005 database used by several applications. Some users wish to query the database directly from excel. I can understand this, because it is a useful tool for ad hoc q开发者_如何学[详细]
2022-12-27 12:13 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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