其他常见的错误是文档实际上是结构良好的，但是没有在期望的地方包含期望的元素。
The other common error case is where the document is indeed well formed but doesn't contain exactly the elements you expect exactly where you expect them.
从图形表达、线型运用、尺寸标注、剖面线的表述和工艺结构等方面，剖析了常见的机械图样错误，并举例进行正误对比，提出了改进措施。
Some common drawing mistakes such as in representation of drawing, utilization of line styles, dimension label, description of section lines and technical structures are analyzed.
从图形表达、线型运用、尺寸标注、剖面线的表述和工艺结构等方面，剖析了常见的机械图样错误，并举例进行正误对比，提出了改进措施。
Some common drawing mistakes such as in representation of drawing, utilization of line styles, dimension label, description of section lines and technical structures are analyzed.
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