Over four years of work experience in the trade and some courses in floor covering installation are usually required to be eligible for trade certification.
或者通常需要超过四年的行业工作经验，以及一些地板覆盖安装课程，才有资格申请行业认证。
Over four years of work experience in the trade and some courses in floor covering installation are usually required to be eligible for trade certification.
或者通常需要超过四年的行业工作经验，以及一些地板覆盖安装课程，才有资格申请行业认证。
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