文中证明了梯子的排斥下整和数为1。
This paper has proved the exclusive lower integral sum number of all ladders is 1.
采用四轴联动数控铣床及自行设计的指状铣刀和数控程序，对膨胀机叶轮进行光整加工。
Four shafts linkage NC milling machine is used for polishing impeller of an expending machine, which finger - like milling cutter and NC system is designed.
采用四轴联动数控铣床及自行设计的指状铣刀和数控程序，对膨胀机叶轮进行光整加工。
Four shafts linkage NC milling machine is used for polishing impeller of an expending machine, which finger - like milling cutter and NC system is designed.
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