请根据这段内容换句话说：水利工程防渗漏的主要技术为混凝土防渗墙技术、帷幕灌浆防渗技术、高压喷射防渗技术、劈裂灌浆防渗技术等四种，不同的防渗技术，其具体操作差异性较大。

There are four main techniques for preventing seepage in hydraulic engineering, including concrete seepage wall technology, curtain grouting seepage prevention technology, high-pressure jetting seepage prevention technology, and splitting grouting seepage prevention technology. These techniques have significant differences in their specific operations.