或者通常需要超过四年的行业工作经验，和大学或电气力学行业课程的组合，才能获得行业认证。
A combination of over four years of work experience in the trade and some college or industry courses in electrical mechanics is usually required for trade certification.
或者通常需要超过四年的行业工作经验，和大学或电气力学行业课程的组合，才能获得行业认证。
A combination of over four years of work experience in the trade and some college or industry courses in electrical mechanics is usually required for trade certification.
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