...过摆动或移动进入(退出)换刀工作区。特点是换刀运动集中，运动部件少。但刀库运动多，布局不灵活，适应性差。如桥堡(Bridgeport)公司的VMC760立式加工..
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哥尼斯堡曾有七座桥梁，1736年，欧拉证明了要走过哥尼斯堡的七座桥且每桥只通过一次是不可能的。
Konigsberg had seven Bridges, and in 1736 Euler proved it was impossible to find a path that allowed you to cross each bridge exactly once.
谢夫贝克在法国巴黎学习过，又去了布列塔尼的阿旺桥，在那里她花了一年的时间进行油画创作，接着又去了托斯卡、康沃尔与圣彼得堡。
Schjerfbeck studied in Paris, went on to Pont-Aven, Brittany, where she painted for a year, then to Tuscany, Cornwall and St Petersburg.
他们被要求在与波士顿堡海峡相邻的北街桥处创造一个水上交通站。
They were challenged to create a new water transit station on a site in Boston's Fort Point Channel adjacent to the Northern Avenue Bridge.
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