commercial well meaning in Chinese

有经济价值油井
有开采价值的油井

Since the late 19th century , many wells in the city had been abandoned after the government had banned the use of well water . in 1963 , due to the lack of water sources , the kai fong welfare associations of hong kong and kowloon began to survey and register the number of private and commercial wells , and soon reopened them . it was discovered that there were over 3 , 500 wells in hong kong and by june 1963 , the government had re - opened more than 280 of them
自十九世纪末期，政府禁用地下水后，城内的许多水井都被弃置，为增加淡水资源， 1963年港九各区街坊会调查及登记各区私人或工商业用途的水井数量，实行将旧有水井开放，发现全港共有3 , 500馀个水井， 63年6月，政府开放的水井有280馀个，每天可供水40至50万加仑。