technical and economical benefit 基本例句 技术经济效果 Effort has been made on two main continuous ore-drawing and haulage systems and prominent technical and economic benefit have been achieved in China during the past ten years.我国经过近十年的努力，研究试验了两种采场连续出矿运矿的技术路线，并取得了显著的技术经济效果。