This element specifies the URL to the worksheet feed for the spreadsheet and provides a way to drill down to the next level of detail.
该元素指定电子表格的工作表提要的URL，并提供一种方法来向下钻取更深一层的细节。
After the modification of step feed mechanism of deep drill combined machine tool, simplifying structure, convenient adjustment and reducing fault rate have been proved.
对深孔钻屑组合机床分级进给机构进行改进后，达到了简化结构、方便调整、减少故障的目的。
By applying apparatus for piezoelectric ceramic vibration drilling, the method of varying feed rates in vibration drilling is used to drill the micro-hole.
应用压电陶瓷振动台振动钻削装置，采用变进给量振动钻削法加工微小孔，并用工具显微镜对入钻定位误差和出口毛刺进行测量。
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