Saving Labour cost. Suitable for high volume production by using single type of machines, one worker can operate 2 ~ 3 production lines.

节省人工，适用于单一机种大批量生产，一人可操作2 - 3条生产线。

youdao

Just a new labour saving technology for the distribution of goods.

FORBES: Of Course WalMart Destroys Retail Jobs: That's The Darn Point Of It All

Perhaps his greatest claim to fame came in 1993 when he called for the end to the union block vote and was credited with saving the then Labour leader John Smith from a humiliating defeat.

BBC: The John Prescott story

It is a sorry end for a French icon that dates from 1932 and was a pioneer of labour-saving domestic appliances.

ECONOMIST: The troubles of Moulinex-Brandt: Kitchen sinking | The