As the thickness of blank increases, when the special products was required in thickness, it may be thought of graded hot-pressing.
但随板坯厚度(层数)的增加，即在制造厚度有特殊要求的产品时，应考虑采用分步热压法。
The sections are graded which means that the level increases as you progress through the test.
整个部分按难易程度划分成几段，即随着考试的进行，难易水平会逐步升高。
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