The operators for critical and special process must be provided with special and professional training, and can only be allowed to work with qualification certification.
关键工序、特殊工序操作人员要经过专门、专业培训后，持证上岗。
The operators for critical and special process must be provided with special and professional training, and can only be allowed to work with qualification certification.
关键工序、特殊工序操作人员要经过专门、专业培训后，持证上岗。
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