Previous experience in chemical products processing as an assistant, labourer or helper may be required for some occupations in this unit group.
本单元组的一些职业可能需要作为助理，劳动者或助手的化工产品加工的经验。
Previous experience in chemical products processing as an assistant, labourer or helper may be required for some occupations in this unit group.
本单元组的一些职业可能需要作为助理，劳动者或助手的化工产品加工的经验。
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