MQP (metadata Query Planner) - internal component that prepares and executes metadata queries.

MQP (Metadata Query Planner) -准备和执行元数据查询的内部组件。

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RQP (relational Query Planner) - internal component that prepares and executes relational queries (SQL) against databases.

RQP (Relational Query Planner) -对数据库(SQL)准备和执行关系型查询的内部组件。

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Therefore, the tool rest component can be turned relative to the base to ensure that the planner tool is completely exposed, so an operator can conveniently maintain and replace the planer tool.

如此，使得刀架组件可以相对于底座翻转，使得刨刀完全暴露在外面，这样，方便操作者对刨刀进行维修或更换。

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