机械行业标准《精密冲裁件质量》及《精密冲裁件结构工艺性》的修订
궤계행업표준《정밀충재건질량》급《정밀충재건결구공예성》적수정
Revision for standards of 《Quality of fine blanked parts) and 《Structural processability of fine blanked parts》 in machinery industry
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