裂纹是钢锻件锻压加工中常见的主要缺陷。
Crack is the main flaw happening in steel forging deformation.
机械压力机是金属塑性成形加工中的最主要的锻压设备之一。
The mechanical press is one of the most main forging and stamping equipments in metal plasticity forming processing.
但不包括金属板加工机，金属成形机与锻压机。
But excludes sheet metal working machinery and metal-forming and forging machines.
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