Means of providing this assurance could include one or more of the following: - 清洁证书 certificate of cleaning - 残留物的测试 testing for trace impurities ..
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certificate of cleaning
清洁证书
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In Jan. 1999, attend training for auditor of cleaning production in Hangzhou, passed the exam, obtained certificate issued by national cleaning production center in 2000.
1999年1月在杭州参加了清洁生产审计师培训，并通过考试，2000年年获国家清洁生产中心颁发的证书。
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Gift certificate for a day of yard work, house cleaning, window washing, or car washing.
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