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.
或者通常需要累计超过四年的行业内工作经验，和高中，大学或玻璃行业课程的组合，才有资格获得行业认证。
A combination of over four years of work experience in the trade and some high school, college or industry courses in glazing is usually required to be eligible for trade certification.
或者通常需要超过三年的行业内工作经验，和的高中或摩托车修理大学课程的组合，才有资格获得行业认证。
A combination of over three years of work experience in the trade and some high school or college courses in motorcycle repair is usually required to be eligible for trade certification.
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