扇区孔;段孔
Index hole: A hole in a floppy disc which is used to signal the start of a track or sector.
指标孔:在软盘上的小孔,它标志一区份或轨道的起点。
The Grey Decision on Stand-Hole Regeneration of Schrenk Spruce Stand in the Mid-Eastern Sector of the Tianshan Mountains The Effects of Dwarf Bamboo on the Gap Regeneration of Subalpine Dark Coniferous Forest in Wolong Nature Reserve
天山中东部天山云杉林窗更新的灰色决策小径竹对卧龙自然保护区亚高山暗针叶林林窗更新的影响研究
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