【經(jīng)】 capital saving inventions

節(jié)省的英語翻譯：

cut down; economize; pinch; retrench; save; scrimp; stint
【經(jīng)】 save

資本的英語翻譯：

capital; principal; what is capitalized on
【經(jīng)】 accounting capital; capital; negative debt; principal; proprietorship

發(fā)明的英語翻譯：

invent; contrive; devise; excogitate; originate; contrivance; invention
creation
【經(jīng)】 invention