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。
2
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。
3
By applying apparatus for piezoelectric ceramic vibration drilling, the method of varying feed rates in vibration drilling is used to drill the micro-hole.