图纸应该定义一个部品而不能规定制造方法。
The drawing should define a part without specifying manufacturing methods.
不同制造商给出的实际额定负荷取决于他们采用的定义方法，因此，一般无法直接加以比较。
The actual load ratings quoted by various manufacturers depend on the way in which they are defined so that it is not always possible to make direct comparisons between them.
介绍了制造加工精度的定义和重要意义，对制造加工精度的检测方法、检测仪器和系统进行了分析讨论。
The definition and importance of machining precision is given, measurement method, measurement instrument and system is discussed respectively.
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