Occasionally one can determine whether stone tools were used in the right hand or the left, and it is even possible to assess how far back this feature can be traced.
偶尔，人们可以确定石器是用在右手还是左手上，甚至可以评估这种特征可以追溯到多远以前。
Google has even taken on some of Bing's distinctive look, like giving people the option of a Bing-like colorful background, and the placement of navigation tools on the left-hand side of the page.
Google甚至借用了必应的一些特色显示模式，比如允许用户选择类似必应的各色背景图案，及页面左侧栏放置导航工具栏。
Rough turning tools can be right-hand or left-hand types, depending upon the direction of feed.
粗车刀具按其进给方向可以是右手型的或是左手型的。
Facing tools. Facing tools are employed in facing operations for machining plane side or end surfaces. There are tools for machining left-hand-side surfaces and tools for right-hand-side surfaces.
端面刀具用在端面作业中加工平板侧面或端部表面，也有加工左右侧表面之分。
Facing tools. Facing tools are employed in facing operations for machining plane side or end surfaces. There are tools for machining left-hand-side surfaces and tools for right-hand-side surfaces.
端面刀具用在端面作业中加工平板侧面或端部表面，也有加工左右侧表面之分。
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