一种新型渠槽预制机研制成功由浙江省义乌市水利电力局研制的混凝土Ｕ型渠槽和渠槽预制机，经国家鉴定获得专利之后，已在该市推广衬砌Ｕ型渠槽２５０ｋｍ，并向全国１６个省、１８０个县市水利部Ｕ推广Ｕ型渠槽预制机１８０余台。如何进行渠道防渗防漏，提高灌溉用水的利... A new trench precast machine developed successfully by the Zhejiang Provincial Yiwu Water Resources and Hydropower Authority developed concrete U-shaped channel and channel pre-machine, after obtaining a national patent, has been in the city to promote lining U-shaped channel 250km, and More than 180 U-shaped channel precast machines are being promoted to the Ministry of Water Resources in 16 provinces and 180 counties throughout the country. How to prevent leakage of seepage channel to improve irrigation water ...