Dismantling operations personnel must be approved by the professional safety and technical training, the implementation of certificates.
拆装作业人员必须经专业安全技术培训，实行持证上岗。
Dismantling operations personnel must be approved by the professional safety and technical training, the implementation of certificates.
拆装作业人员必须经专业安全技术培训，实行持证上岗。
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