The NanningGuiyangKunming economic region is a principleaxis in the land development in Western China. It enjoys comparative advantage in location, resources and market.
南贵昆经济区是中国西部地区重要的国土开发主轴，它具有在区位、资源和市场方面的比较优势。
2
The most widely used machine tool is the engine lathe, which provides a principleaxis rotary primary motion to while the appropriate feed motions are imparted to the tool.
最用途广泛的机械工具是引擎车床，提供一个原则轴转台式主运动，当适当的合闸动作被给予到工具时。
3
It aims to realize the laser quenching and cladding for the principleaxis and crank of single or more crank while the crankshaft is laid horizontally and rotating around the principal axis.