轴瓦瓦背与瓦座（瓦窝）的配备有哪些要求？
The（）has a built-in world map; most areas are displayed on a scale of 4000 nm from the top to the bottom of the screen，and can be zoomed in to 150 nm. ["chartplotter","C-MAP NT","C-Cards","PPI"]
属于“攻下派”的是（） ["朱丹溪","李东垣","张从正","刘完素"]
“寒凉派”的代表人物是（） ["朱丹溪","李东垣","张从正","刘完素"]
主轴瓦的径向间隙和侧部间隙应留多大为合适？
轴颈与轴瓦的接触角及接触点应留多大为标准？
