... 工具栏按钮 toolbar button 滚动箭头按钮 scroll arrow button 滚筒 roller, cylinder (machine part), drum ...
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这里采用的另一种选择是将所有的制表页保持在一行，但是提供箭头按钮来实现沿着行的滚动。
The alternative used here is to keep all the tabs on one row, but provide arrow buttons to scroll along the row.
JSpinner组件，它让用户使用箭头按钮在列表中滚动，从一个有序的列表中进行选择。
A JSpinner component that lets the user select from an ordered list using arrow buttons to scroll through the list.
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