The winch lowers and raises the cable in the well. A depth wheel drives the depth recording system. The data recorder includes a digital recorder and a printer.
电缆绞车下放和提升电缆（把电缆下放到井下和从井下提升上来），深度轮驱动深度系统，数据记录仪包括数字记录器和打印绘图仪。
In this paper, the formula is discussed and the meaning of increasing recorder length of DSO (means increasing of memory depth) is made clear.
文中对这个公式进行了讨论，并指出现代dso增长记录长度(即增加存储深度)的实际意义。
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