labour-saving
adjective(US English labor-saving)
[usually before noun]designed to reduce the amount of work or effort needed to do something 省力的;节省劳力的;降低劳动强度的 modern labour-saving devices such as washing machines and dishwashers 诸如洗衣机和洗碗机之类的现代化省力设备
Oxford Collocations DictionaryLabour-saving/labor-saving is used with these nouns:- device