A section on a log print that gives the scales of the curves displayed and the depth scale. There usually is an insert at the beginning and end of each interval surveyed.
测井打印图上给出显示曲线比例和深度比例的部分，常常在每一个测量层段的开始和结束时都有插图。
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Shown here are a quick-change tooling system based on a standard square-shank lathe toolholder (right), as well as a cross-section of a coated PCBN insert (left).